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your kenwood model TR-7400A is a high-quality 2-meter transceiver for use in ama- teur radio mobile stations as well as base stations . it contains a pll frequency syn- thesizer developed and engineered through kenwood's elaborate vhf technology to provide high performance and outstanding technical characteristics . the TR-7400A is capable of transmitting or receiving f3 fm signals on up to 800 chan- nels at intervals of 5 khz. having 25w rf output power . contents specifications ........................................... 3 final transistor specifications ........................... 4 block diagram .......................................... 5 circuit description ...................................... 6 parts alignment ......................................... 11 pc board pa unit (x45-1090-10) ................................... 13 pd unit (x50-1380-10) ................................... 14 vco unit (x50.1370.10) .................................. 15 indicator unit (x54-1210-10) ............................ 16 rx unit (x55-1150-10) .................................. 17 tx unit (x56-1230-10) ................................... 18 parts list ............................................... 19 packing .................................................. 25 disassenibly ........................................ 26 troubleshooting ........................................ 29 level diagram ........................................ 32 adjustnieiuts ............................................ 33 schematic diagram ...................................... 40
specifications general semiconductors frequency range frequency synthesizer synthesizer stability mode number of channel operating temperature power voltage grounding antenna lmpedance dc current dimension weight transistors 58 fets 8 i cs 19 diodes 63 144.00 to 147.995 mhz digital (ttl logic) control of phase locked vco less than k750 hz at 25"~ fm 800 -20 to +50c 11.5 vdc to 16.0 vdc (13.8 vdc as reference) negative grounding 50 52 less than 1a in receive with no input signal less than 8a in transmit (hi) less than 4.5a in transmit (low) (at 13.8 vdc) 182 mm (7-3116") wide 74 mm (2-718") high 270 mm (10-518") deep approx. 2.8 kg (6.2 ibs.) transmit section rf output power high 25 watts (min.) low approx. 5 watts (adjustable up to 15 watts) modulation variable reactance direct shift max. frequency deviation k5 khz spurious radiation less than -60 db touch tone input impedance 600 52 microphone dynamic microphone with ptt switch, 500 52 receive section circuitry intermediate frequency squelch sensitivity pass band width selectivity (2 signal) image rejection spurious interference lntermodulation audio output option i) tone squelch tone deviation encorder response frequency stability tone squelch open sensitivity tone distortion ii) tone burst burst time double superheterodyne 1st if 10.7 mhz 2nd if 455 khz less than 0.4 pv for 20 db quieting (less than 1 ,uv for 30 db sin) less than 0.25 ,uv more than 12 khz at 6 db down more than 72 db at 30 khz of adjacent channel more than 70 db more than 60 db more than 66 db more than 1.5 watts across 8 52 load (10% distortion) k0.5 khz (adjusted) less than 0.5 sec. less than 21% less than slnad 10 db less than 5% approx. 0.5 sec. (adjusted) note: the circuit and ratings may change without notice due to development in technology.
final transistor (2n6083) specifications maximum ratings ta = 25o~ (unless otherwise specified) characteristics standard ta = 25oc (unless otherwise specified.) item unit ratings v cso v 36 symbol vceo v 18 ltpd level condition 5 5 ~fe cob vebo v 4 minimum 1 1 vce = 5v, ic = 1a 5 5 1 / vcb = 15v, f =0.1 mhz 1 standard value maximum 5 vcc = 12.5 v, pout =30w ) 5.7 db 10 1 f = 175 mhz, vcc = 12.5 v, pout =30w rl 1 6 5 % 10 1 f = 175 mhz, ices vce= 15 v, tc = 55oc 10 ma 5 1 i c a 4 unit vcb = 15 v icbo 1 - rn a bvces ic = 15 ma v pd ta=~~"c w 6 5 bvceo bvebo - stud torque inib 6.5 ic = 100 ma v - tstg "c -65 to 200 - ie = 5 ma 4 , v
block diagra! rx unlt (x55-1150-10) r- ----------- - --------------- -------- i i i i l ,,-,---,-----------, +--<&--, rxa lr - ts smi s1 s2 s3 ti0 pll r-----------b sau vra i vco unlt (x50-1370-10) ' i i tx unit (~56-1230-10) txb selector i zsc458 2sc458 burst a v t-----~---- -1 - - - - - - - -.(b i i i t' i i i114171919151 i - power sw tlr-313x6 j l--------,- display unit (x54-1210- 10) 13.8v display unit (x54- 121 0- 10) r---------- 1 i i dec. driver i sn7447an x 3 -t 600 switch board (bcd 400-799) i i vco unlt (x50- r------ - - - - - - - - - - - - - - - - - - - - - - i ~lvl~-n(1/537- 1/936) pw mc74416x3 zsc460 buff amp i 2sc460 zsc460 i a ! i i tx offset logic p.d mc4044p l okhz a i ' 1 2.56mhz 160 khz i , refosc,l/2 1/16 1/16 1~15% unit t i td3400 h td3493 td3493 2~~733 (~50-1380-10) 22% - - - - - - - - - - - - - - - - - - - - - -- - -
unit (~50-1370-10) _ _-_--- --- ---- ------- 1 i ---------- -------- i i tx, rx i mixer i d i
k,*,j the block diagram of the TR-7400A is shown in page fig. 2 shows the frequency relationship of the system. 5. afr and af,! are the frequency deviations of the ref osc the TR-7400A incorporates new1 y developed circuit and local osc respectively. you will see how the vco techniques such as a pll frequency synthesizer as the local frequency changes with the deviations and n preset in the oscillator. programmable counter. pll circuit the block diagram is given in fig. 1. the circuit is outlined below. the outputs of the vco and local osc are mixed together and converted to 5.37 -- 9.36 mhz signal and divided to 1/537 -- if936 with the programmable counter to obtain a 10 khz output. the phases between the 10 khz output and another 10 khz signal obtained by demultiplying 5.12 mhz ref osc output to 11512, are compared. and the phase difference, if any, is fed back to the vco to lock it. the stability of this function is determined by the local osc and ref osc, and the stability of the vco is virtually equal to that of a crystal oscillator. ref osc el n (fr +afr) fo =----- + (41 +of 9.) nr - divider 1/nr p. d. i local fig. 2 frequency relationship of pll system display unlt (x54-1210-10) r------------ 1 unlt (x50-1370-10) - i i ---- 2.56 mhz pd unlt (x50-1380-10) fig. 1 pll circuit block diagram tx. rx *mixer
vco unlt (x50-1370-10) the vco is a colpitts type oscillating circuit (07) and its frequency varies with the control voltage applied to varicap diode dl. this circuit is strictly stabilized against changes in temperature and power source voltage to im- prove the c/iu of its output and prevent unlocking.. the vco's output is passed through buffer 06, amplified by 012 and applied to mix through d6 and d7 for both reception and transmission. in the local osc, two quartz crystals for 0 and 5 khz are switched with a switching diode. 08 performs over- tone oscillation and its output is tripled in 09 to 127.930 and 127.935 mhz which are applied to mix stage. the lmlx circuit mixes the output and the vco's output ampli- fied by 05, and its output is passed through a .rr-type lpf to deliver if output of 5.37 - 9.36 mhz. the output is amplified by the wide-band amplifier of 01 to 03 and applied to the programmable counter. 013, which turns on and off vco amp 012, is a protective circuit in order to prevent emission of spurious radiation occurring when the pll circuit fails to lock and the vco runs away. this circuit is automatically reset when the pll begins to work properly because it is not involved in the phase lock loop. d8 provides a certain time delay when 013 is turned off, so 013 does not operate during the transient state before the vco is locked, though the indicator works. this contributes to reduce noise. pd unlt (x50-1380-10) 06 serves as the interface and buffer amp for ic8. the waveform of its if output is shaped in ic8 and its output frequency is divided to 10 khz by the program- mable counter consisting of ic5 to 12 and the resulting signal is applied to mc4044p of ic4. while ic1 generates 5.12 mhz signal which is divided .to 112 by the flip-flop circuit involved in ic1. the resulting frequency is further divided to 1/16 in ic2, ic3 and 10-khz output signal is' applied to mc4044p of ic4. - the mc4044p consists of two pds (phase detectors), charge pump and amplifier. fig. 3 shows the block diagram. passing through the charge pump and active filter, the out- put of no. 1 pd becomes the control voltage to be applied to the varicap of the vco. the active filter consists of 01 to 3 to keep the vco away from phase comparator vd noise. no. 1 pd, a digital phase comparator, contains a sequential logic circuit which operates at the edge of decay of signal coming to enter r and v terminal. its state be- comes as shown in fig. 2 after a certain time. when r is not equal to v (unlocked state), dl or d2 is turned on and 05 turns on 04 to switch off 013, vco amp driver, so that spurious emission which might occur if the pll fails to lock is prevented. w i c4 vco 0 to vari cap. ref osc u 1 pu u f - m - r\ " - v -" pd charge w fi - no. 1 a pump p-- dl w - w w pd d f no.2 ; - to 013 (off circuit of vco output) 04 5 v unlock fig. 3 phase detector block diagram indicator
programmable counter and tx-offset ing counter which counts in the order of 0, 4, 3, 2, 1, 0 circuits (5), 4, 3, ..... receiving input pulses, assuming that preset these circuits, consisting of ic5 to ic12, are basically a modulo-n programmable counter of ic5 to ic7 added with an extender consisting of a d-flip-flop of lclo and a logic circuit of ic8, 9, i i and 12. it belongs to the high-speed scaling method. fig. 4 shows the opera- tion of the circuits. the operation is simply described below. a division ratio is preset in the mc74416 of ic5 to ic7 with a bcd code. the division ratio preset lies be- tween 400 and 799 in relation to digital indication (144.00 - 147.99). while, since the if signal entering the mc 74416 is 5.37 - 9.36 mhz to eliminate beat interference in reception, the division ratio must be 537 - 936 actually. for this purpose the gate, no, serves to raise the division ratio by 137. the gate circuit, u and d, shifts frequency by f600 khz for repeater operation which is equivalent to the div~sion ratio of 137 f 60. mc74416 is a decrement- value is 5 and pe is "0" (l level). but output becomes "1" (h level) only when the count is 0. it means that five input pulses make one out- put pulse and the frequency is divided to 115. with three ics connected in cascade, the division ratio can be raised up to 999. iclo is a high speed d-flip-flop which improves the operating frequency of mc74416, 8 mhz (min.), by a factor of two or more with the aid of gates a and b. fig. 4 shows the case where the least significant digit of the actual division ratio, ns, is 7. although resetting should be done at the rise of input pulse and presetting should be done at the decay of the input pulse when the count has become three, the level at a is set to l at the count of five and it becomes the output of ic10-1 at the next pulse. this output (01) resets the mc74416 and presets it to n at the same time, but counting is not per- formed since pe remains at the l level during the next fig. 4 block diagram of programmable counter and tx-offset circuit
circuit descriptions input pulse and it is reset. the operating frequency has been improved because resetting and presetting are done in one cycle of input pulse but not in half a cycle, and the delay time, t2, of the high speed d-flip-flop in lclo is much smaller than the delay time, tl, from ic5, 6 and 7 and logic circuit to point a. next, operation is explained in relation to the tx off- set switch setting. 1 +600 during reception, this is the same as in (2). during transmission, sr 1 is turned on and becomes u in table 2. gate u therefore opens and gates no and d are closed. at this setting, ns = in + 197 (137 + 60), and it operates as an extender when ic5, ic6 and ic7 take code 8, 0 and 5 respectively, to perform division of n + 197. 2 no (simp) (f) and (g) make up no in table 2. gates no and u open and gate d is closed. at this setting, the relation, ns = n + 137, holds between preset value n and actual divi- sion ratio ns. it is enough to decrement the counter after division of n (decrernenting) has completed and perform resetting and presetting just when the count has become 137. for this purpose, ic5, ic6 and ic7 do not take code 8, 6 and 3 respectively (as already described), but it operates as an extender at code 5 and performs division of n + 137. since the gate is of code 197 (137 + 60), the extender operates before this code triggers the circuitry. 3 -600 during reception, sr2 is turned on as in (2). during transmission, gates no, u and d open as d in table 2. at this setting, ns = n + 77 (137 - 60), it operates as an extender to perform division of n + 77 when ic5, ic6 and ic7 carry code 9, 2 and 5 respectively. at this time, the extender operates at code 77 even when all gates are open table 1 shows the case of n = 400 (144.00 mhz). - tsbl active filter n tone squelch circuit *d fig. 5 shows the circuit. the tone squelch circuit employed in this equipment is the so-called ctcss (con- tinc~oc~s tone controlled squelch system). tone signal of a certain frequency is superimposed with audio signal at the trans~rlission side, which is separated at the reception side to drive the squelch circuit. when set to sou (tone squelch) as shown in fig. 5, a voltage is applied to tsbi and tsb2. when no signal is received or signal received does not have tone component, 020 and 21 remain off and no sound is reproduced since the voltage of tsb2 is applied to the base of q13 through dl4 and the af circuit is turned off. when signal including tone component is received, the tone signal separated from discriminator output with 019, lpf and amplifier, is applied to an active filter. the active filter which serves to the tone frequency and 01 1 give steep characteristics at the frequency. it selects tone output equal to the active filter and its output passes through dl 1 (on during reception) and is detected in dl2 and 13. it turns on 020 and then 021 and turns off q13 and the af circuit (014) operates to reproduce sound from speaker. in the af circuit, an active type high-pass filter of 024 and 25 cuts off tone signal output to arnplify audio signal alone. during transmission, 022 is turned on, and the active filter and 01 1 forin an oscillating circuit to deliver output with the same frequency as of the active filter. this oc~tpc~t is passed through vr3 and modulated in tx unit together with audiosignal. the maximum frequency deviation for audio signal is f5 khz and that for tone com- ponent for tone squelch is k0.5 khz, which results in a ratio of about -20 db. this would result in buzzing sound when unmodulated signal is received, but a high-pass filter of 300 hz in cutoff frequency corporated in the equipment reduces the tone level to prevent buzz. operation is the same even in the sub (sub-audible) since a voltage is applied to tsbi, and sub-audible control is performed. i i 2 13 h8d5022 i i dlsc l ---a output e l.p.f. amp to base of 013 fig. 5 tone squelch circuit
description table 4 squelch active filter list table 5 tone burst oscillator module list frequency (hz) 88.5 94.8 100.0 103.5 107.2 110.9 114.8 118.8 128.0 127.3 131.8 136.5 141.3 146.2 151.4 156.7 parts number l79-0408-05 l79-0409-05 l79-0410-05 l79-0411-05 l79-0412-05 l79-0413-05 l79-0414-05 l79-0415-05 l79-0416-05 l79-0417-05 l79-0418-05 l79-0419-05 l79-0420-05 l79-0421-05 l79-0422-05 l79-0423-05 vct circuit frequency (hz) 1800 1950 2000 2100 21 50 2200 2250 2400 2550 the equipment incorporates a vct circuit at the out- put side of the transmission mixer to improve spurious radiation and output levels in the wide range from 144 to 148 mhz. varicaps d2, 3 and 4 are connected to tuning coils l11, 12 and 13 through temperature compensation capacitors. voltages divided from common 9v (c9) with r62 and 61 (145.5 mhz), vr61 (144.5 mhz) vr62 (146.5 mhz) and vr63 (147.5 mhz) and switched with the mhz switch are applied to d2, 3 and 4. parts number tbm-1800 tbm-1950 tbm-2000 tbm-2100 tbm-2150 tbm-2200 tbm-2250 tbm-2400 tbm-2550 final circuit the output of the tx unit iabout 1.4 w, 50-ohm) load) is amplified to about 10 w (50-ohm load) by 01 of the pa unit and to about 35 w (50-ohm load) by 02 and delivered to the ant terminal by way of an ant switching diode and a lpf. to protect the final transistor (02), the input power to 02 is limited by controlling the collector voltage of the driver (015 of tx unit and 01 of pa unit) by detecting swr of antenna with 03, 10 and 11. when power is low, the circuit is used to reduce the voltage across the sb terminal with vr5. large aluminum die-cast heat sinks in combination w~th motorola transistors, mrf208 and 2n6083, ensure high reliability.
knob (squ) (k21-0703-04) knob (vol) (k2 1-0704-04) knob (mhz) (k2 1-0702-04)' 4p microphone (e06-0403-05) case (8) (a01-0704.12) 2p connector (e07-0251-05) case (a) (a01-0703-22) parts alignment led led (838-0302-05) (838-0301-05) knob (main) (k21~0705-04) '1 sub panel knob (5 khz) knob (tx offset) (a22-0701~03) (k29-0702-04) (k23-0702-04) mounting bracket mounting rail earphone jack stopper (j90-0045-04) (e 11-0003-1 5) (j51-0006-15) i i i 4p socket (e08~047 1-05) heat sink (f 20-0502-05) i
parts alignment display unlt pd unlt (x54-1210-10) (x50-1380-10) i tx unlt (x56-1230-10) rf meter adj. i i i ~v'avr tone burst time adj. i i tone oscillator module pa unlt (option) (x45-1090-10) vco unit rx unit (x50-1370-10) (x55-1 150-10) center meter point i i s meter adj. i i ton< unit i ~rotecti6n adj i loption) switch board tone dev. adj. herical resonator
v pa unit (x45-1090-10) gc pc board
pc board q1, 2:2sc458 (b), ~312~~1345 (e), q4:2sc733 (y), q5:2sa495 (y), q6:2sc460 (b), ic1, 8, 9:td3400ap, ic2, 3:td3493bp, ic4:mc4044p, ic5-7:mc74416p, iclo:td3474ap, ic11 :td3410ap, ic12:td3420ap, dl-3:1s1555 td3400ap td3474ap 2sc460 (b) 2sc733 (y) td3410ap td3493ep 2sc458 (b) 2sa495 (y1 td3420ap mc4044p mc74416p i""l f""i b b 1234567 1234 5678 r pc board for switch (525-2506-131 pc board for choke (525-2507-041 c 9
pc board v vco unit (x50-1370-10) 2sc733 (y) 2sc785 1yi
c)j pc board indicator unit (x54-1210-10) lock indicator iclw3:sn7447an, dlw6:tlr-313 (c, d)
r rx unit ( pc board 0 ?i 0 z g '*n 2 4 3 g m co n - coh]n =am- -,lo ->lo a-- .lo? - rn .. eh]~ 20 g *- 0 .. - gz; - 7 or;. 9 5. hlf'n *' - 0- h] * cc) lo'g= -w- ln r-. a-"- lo'efl"' 7 4 4 h]- --7 emd g%: *-r-. o 0 ~n m c\i " " ; o,%n ? -- bgl lt *- g k* a ,- * -h] a - o 2 yj" - -0 7 3 sb', ln-0 "m' - h]-2 aa, : rn- 2%~ $kg 5 2 "hlr; --hl aaa
pc board tx unit (x56-1230-10) 1 r- o cj >- 0 - g d 8: v) c" " .. lc) 2) -
parts list * : new darts total i ref. no. parts no. i description i ref. no. 1 parts no. 1 description re- mark i capacitor i ~18-0802.05 relay socket e22-0207-05 lug e23-0047.04 terminal x 1 i e30-0355.05 wire (for speaker) e31-0403-05 connector with lead e31-0404.15 connector with lead e31-0405-05 connector with lead e31-0406-05 connector with lead e31-0407-05 connector with lead e31-0408-05 connector with lead e31-0409-05 connector with lead e40-0513-05 mini connector wafer e40-0616-05 mini connector housing x 2 tone filter e40-0713-05 mini connector wafer e40-0913-05 mini connector wafer e40-1013.05 mini connector wafer ce04wla470 electrolytic 47~f 10wv ck45flh103z ceramic 0.01~f +80%,-20% ck45d1 h102m ceramic looopf f20% ck45f1 h103z ceramic 0.01~f +so%,-20% cc45sllhioi k ceramic ioopf ? 10% resistor semiconductor transistor 2sd235 (y. 0) f05-1031-05 fuse (loa) x 2 f19-0601.14 blinding plate a (ins~de) f19-0602-04 blinding plate b (outs~de) f20-0078-05 l nsulating plate f29-0014-05 l nsulating washer diode v068 diode is1555 led with holder led with holder diode is1555 cushion cushion vibration protector (rubber) i potentiometer i case (inside) buffer fixture styrene foam cushion (upper) styrene foam cushion (lower) protection coyer polyethylene bag (60 x 110 mm) polyethylene bag (200 x 200 mm) polyethylene bag (125 x 250 mm) vr61-63 rip-3025-05 semi-fixed resistor 10kr vr101.102 r19-9401-05 variable resistor i i 571, 72 5102 s103 rllol swltchlrelay rotary switch (mhz) lever switch (tx offset) push switch (5 khz) rotary switch (tone) push switch (hi-low) push switch (power) j01-0021-04 leg j02-0069-05 leg (rubber) x 2 ji 3-0029-05 fuse holder j21-0941-02 mounting bracket ~25.2506.13 pc board (for switch) j25-2507-04 pc board (for choke) j25-2508-04 pc board (for ts) j32-0029-04 hexagonal boss x 3 (pc board for choke) j32-0217-04 hexagonal boss x 4 (pll) ~32-0704.04 hexagonal boss x 5 (for s74) ~41-0020.04 knob bushing x 2 ~51.0006.15 mounting bracket stopper x 2 ~90-0045.04 mounting rail x 2 1 relay coil l15-0016-05 choke coil (low frequency) l40-1021-03 ferri inductor 1mh i i ( miscellaneous i case (a) case (8) chassis panel sub panel knob (mhz) knob (sq) knob (af, tone) x 2 knob (main) x 2 knob (tx offset) knob (hi-low, power) x 2 knob (5 khz) escutcheon(a) (right toward you) escutcheon(8) (left toward you) speaker grille cloth front glass , s meter speaker microphone model name plate name plate (terminal) label warranty card operating manual pa unit vco unit pd unit indicator unit rx unlt e06-0403-05 4p microphone jack ~07-0251.05 2p connector (plug) em-0471 -05 4p socket e09-0471-05 4p plug tx unit
parts list pa unlt (x45-1090-10) capacitor re- marks ref. no. coil parts no. 1 description c1 c2 c3 c4 c5 c6, 7 c8 c9 c10 c11, 12 c13 c14 c15 c16 c17 c18 c19 c20 c2 1 c22 c23.24 c25 c26 c2 7 c28 c29 c30-32 c33 c34 c35 c51 c52 c53 l1 l2 l3 l4 l5 l6 l7 l8 l9 l10, 1 1 l12 l13 l51 ck45sl2h100d ck45sl2h070d cc45ch2h220j cc45ch2h470k ce04wlc100 ck45dlh102m ce04wle100 ck45f1 h1032 ce04wlc220 ck45flh1032 cc45sl2h470k cc45sl2h220j cc45sl2h470k ck45d1 h102m ck45f1 h103z ck45d1 hi 02m ck45f1 hi 03z ck45d1 h102m ck45sl2h070d ck45sl2h470k ck45sl2h220j ck45sl2h070d ck45sl1 h020c ck45sl2h070d ck45f1 h103z ck45d1 h102m ck45f1 hi 03z ce04wlc100 ck45f1 hi032 ck45d1 h102m ck45sl2h150j ck45f1 h103z ce02w1 el02 l34-0426-05 l33-0604-05 l34-0478-05 l33-0173-05 l34-0605-05 l34-0624-05 l34-0604-05 l33-0025-05 l34-0464-05 l34-0430-05 l40-1001-03 l33-0074-05 l34-0604-05 ceramic lopf f 0.5pf ceramic 7pf f0.5pf ceramic 22pf f5% ceramic 47pf f 10% electrolytic 10pf 16wv ceramic 1000pf f 20% electrolytic 10pf 25wv ceramic 0.01pf +80%,-20% electrolytic 22pf 16wv ceramic 0.01pf +go%,-20% ceramic 47pf f 10% ceramic 22pf f5% ceramic 47pf f 10% ceramic 1000pf *20% ceramic 0.01pf +80%,-20% ceramic 1000pf f20% ceramic 0.01pf +80%,-20% ceramic 1000pf f20% ceramic 7pf f0.5pf ceramic 47pf f 10% ceramic 22pf *5% ceramic 7pf f0.5pf ceramic 2pf f 0.25pf ceramic 7pf *0.5pf ceramic 0.01pf +80%,-20% ceramic looopf f20% ceramic 0.01pf +80%,-20% electrolytic 10pf lowv ceramic 0.01pf +80%,-20% ceramic 1000pf f 20% ceramic 15pf ? 5% ceramic 0.01pf t80%,-20% electrolytic 1000pf 25wv resistor r 1 r 2 r 3 miscellaneous vh f coil (6@ 2t) choke coil with 47r vhf coil (8@ 5t) choke coil with 100r vhf coil (8@ it) vh f coil (8q2t) vhf coil (a@ 2t) choke coil 1ph vhf coil (6@ 4t) vh f coil (6@ 3t) ferri-inductor (10 mh) choke coil (0.3ph) vhf coil (8@2t) - - - - rc05gf2h101j rc05gf2h391j rd14cy2e683j 0 0 a a a carbon loor f5% 1/2w carbon 390a f5% 1/2w carbon 68ka ?5% 1/4w potentiometer ~04-0109.15 e06-0251-05 e22-0207-05 ' ~23-0015-04 e23-0046.04 . v r 1 vr2 vr3 tc1 tc2-4 e23-0047-04 terminal e30-0234.15 lead wire f20-0078-05 l nsulating plate [ 1 f20-0502-05 1 heat sink ~;i - ~32.0703.14 hexagonal boss x 5 vco unit (x50-1370-10) m type connector 2p connector (jack) lug earth lug x 2 terminal x 12 r 12-5024-05 r 12-0042-05 r12-2015-05 - c05-0013-15 ' c02-0002-05 0 capacitor mylar 0.01pf *lo% mylar 0.022pf + 10% electrolytic 10pf 16wv mylar 0.022pf ? 10% mylar 1000pf ?lo% ceramic 10pf ? 0.5pf mylar 0.01pf f 10% ceramic 22pf f 5% ceramic 3pf +0.25pf ceramic 1000pf ?20% ceramic 2pf f 0.25pf ceramic 1000pf" f 20% ceramic 2pf f 0.25pf ceramic 0.01pf +go%,-20% ceramic 15pf ? 5% ceramic 3pf +0.25pf ceramic 15pf ? 5% ceramic 7pf t0.25pf ceramic ipf f0.25pf ceramic 7pf f 0.5pf ceramic 1000pf f 10% ceramic 0.01pf +go%,-20% ceramic 7pf f 0.5pf ceramic 0.01pf +80%,-20% ceramic 10pf ?0.5pf ceramic 27pf +_5% ceramic 0.01pf +80%,-20% ceramic 22pf ?5% ceramic 1 ooopf ? 20% ceramic 7pf f 0.5pf ceramic 22pf ?5% electrolytic 1oopf 16wv ceramic 0.01pf +80%.-20% electrolytic 10pf 16wv c1 c2 c3 c4 c 5 c6, 7 c8 c9 c10 cll-13 c14 c15, 16 c17 c18 c19 c20 c21 c22 c23 c24, 25 c26, 27 c28, 29 c30, 31 c32, 33 c34 c35 c36 c37 c38-40 c41 c42 c43 c44 c45 semi-f ixed resistor 100kr semi-f ixed resistor 500a semi-fixed resistor 5ka ceramic trimmer midget variable capacitor semiconductor cq92mlh103k cq92m1 h223k ce04wlc100 cq92m1 h223k cq92mlh102k cc45ch1 h100d cq92m1 h103k cc45sllh220j cc45th1 h030c ck45d1 h102m cc45sl1 h020c ck45dlh102m cc45ch1 h020c ck45f1 h103z cc45sl1 h 150j cc45chlh030c cc45ch 1 h 150j cc45rhlh070c cc45th1 hoioc cc45thlh070d ck45b1 h102k ck45f1 k!103z cc45sl1 h070d ck45f1 h 103z cc45chlhlood cc45ch1 h270j ck45f 1 h 1032 cc45rhlh220j ck45d1 h102m cc45rhlh070d cc45sllh220j ce04wlc101 ck45f1 h 1032 ce04wlc100 q 1 q2 q3 q4 d 1 d2 d3 d 4 dl0 v30-0224-05 v30-0225-05 v04-0046-05 v03-0093-05 vll-0051-05 v1 1-0255-05 v11-5260.16 vll-0051-05 vll-0171-05 transistor mrf208 transistor 2n6083 transistor 2sd235 (y, 0) transis:or 256458 (b) diode 1 n60 diode mi301 diode m 1402 diode 1 n60 diode sr3am-2 0 a
parts list i ~ef. no. 1 parts no. ) description ref. no. parts no. description c46, 47 ck45flh103z ceramic 0.01pf c48-50 ck45d1 h 102m ceramic iooopf c5 1 cc45rh1 h070d ceramic 7pf c52, 53 ce04wlc100 electrolytic 10pf c54 ce04w1 el01 electrolytic 1oopf c55 ck45f1 h103z ceramic 0.01pf c56 ce04wlc100 electrolytic 10pf c57 ck45flh103z ceramic 0.01pf resistor r 1 rd14cy2b821 j carbon 82052 r 2 rd14cy2b102j carbon i k52 r 3 rd14cyzb330j carbon 33a transistor transistor f et transistor diode diode diode zener diode diode diode zener diode rd14cy26221 j carbon 22052 rd14cy26471 j carbon 47052 rd14cy 2b330j carbon 3352 rd14cy2b273j carbon 27kn rd14cy26123j carbon 12k52 rd14cy26222j carbon 2.2k.q rd14cy2b102j carbon ik52 rdl4cy2b273j carbon 27kn rd14cy2b682j carbon 6.8kcl ~~14~~2~471 j carbon 470a rd14cy26151j carbon l50a rd14cy2b273j carbon 27ka rd14cy2b473j carbon 47k52 rd14cyzb333j carbon 33k.q rd14cy2b471j carbon 47052 rd14cy2bloij carbon loon rd14cy2b823j carbon 82ka rd14cy26330j carbon 3352 rd14cy2b471j carbon 470a rd14cy2blolj carbon rd14cy2e471j carbon 47052 rd14cy26471j carbon 47052 rd14cy26222j caroon 2.2ka rd14cy26332j carbon 3.3k52 rd14cy26561j carbon 56052 rd14cy2b102j carbon i kn rd14cy2b123j carbon 12k52 rd14cy26562j carbon 5.6k52 rd14cy26681 j carbon 68052 rd14cy26102j carbon 1 k52 rd14cy2b473j carbon 47k52 rd14cyzb821 j carbon 82052 rd14cy26332j carbon 3.3k52 rd14cy2b561 j, carbon 56052 rd14cy2b152j carbon 1.5k52 rd14cy2b473j carbon 47ka rd14cyzb273j carbon 27ka rd14cyzb333j carbon 33k52 rd14cyzblolj carbon 10052 potentiometer r 12-1 020-05 semi-fixed resistor 1 ferri-inductor ferri-inductor tuning coil (for 135 mhz) ferri-inductor osc coil (for vco) ferri-inductor choke coil 0.47ph osc coil (for 42 mhz) tuning coil (for 1'35 mhz) ferri-inductor ferrilinductor ferri-inductor tuning coil (for 135 mhz) crystal oscillator 42.645 mhz crystal oscillator 42.6433 mhz ferri-inductor miscellaneous e23-0046-04 terminal x 7 e23-0047-04 terminal x i i pd unit (x50-1380-10) ref. no. parts no. description re- marks i capacitor i cc45sllh070d ceramic 7pf f0.5pf cc45sl1 h470k ceramic 47pf + 10% c90-0262-05 ceramic 0.047pf cs15elc2r2m tantalum 2.2pf 16wv cs15e1 vr22m tantalum 0.22pf 35wv ce04wlhr47 electrolytic 0.47pf 50wv c90-0254-05 ceramic 0.022pf ce04wla101 electrolytic 100pf 10wv c90-0254-05 ceramic 0.022pf ce04wla101 electrolytic 1oopf iowv c90-0262-05 ceramic 0.047pf ck45d1 h 102m ceramic 1000pf f 20% ce04wla101 electrolytic 1oopf 1owv ck45dlh102m ceramic looopf f 20% c90-0262-05 ceramic 0.047pf ck45dlh102m ceramic 1000pf f 20% i resistor i i tcl rd14cy26182j carbon rd14cy2b561j carbon rd14cy26470j carbon rd14cy26472j carbon rd14cy 2b183j carbon rd14cy2b182j carbon rd14cy26472j carbon rd14cy2b332j carbon rd14cyzb472j carbon rd14cy26103j carbon rd14cy26182j carbon i semiconductor i transistor 2sc460 (b) 05 v09-0057-05 fet 3sk41 (l) v03-0253-05 transistor 2sc785 (0) 07 v09-0012-05 f et 2sk19 (gr) transistor 2sc460 (6)
parts list ref. no. r 16 r 17 r18 r 19 r20 r21 r22 parts no. rd14cy2b472j rd14cy2b183j rd14cy2b331j rd14cy2b103j rd14cy2b151j rd14cy213821j rd14cy2b103j ref. no. c8 c9 c10 c11 c12 c13 c14 c15 c16, 17 c18 c19 c20 c21 c22 c23 c24 c25 c26 c27 c28 c29 c30 c31 c32 c33 c34 c35 c36, 37 c38 c39,40 c41 c42 c43, 44 c45 c46 c47 c48 c49, 50 c5 1 c52 c53, 54 c55 c56 c57 c58 c59 c60, 61 c62 c63 c64 c65 c66, 67 c68 c69 c70 c71 c72 c73 c74 c75 c76-78 c79 c80, 81 c82 c83,84 c85 c86-90 c9 1 c92 c93 c94 description mylar 0.022pf f 10% ceramic o.olpf +80%.-20% ceramic ipf f0.25pf ceramic looopf f 20% ceramic o.olpf +80%,-20% ceramic looopf +20% ceramic 220pf f 10% mylar 0.022pf f 10% mylar 0.022pf f 10% ceramic looopf t20% ceramic 470pf f 10% mylar looopf f 10% mylar 0.022pf f 10% mylar 0.039pf i 10% mylar 0.01pf ?lo% mylar 0.022pf f 10% ceramic 470pf f 10% mylar 0.01pf f 10% ceramic 0.01pf +80%,-20% ceramic 33pf f 5% ceramic 7pf f0.5pf ceramic 2pf f0.25pf ceramic 0.01pf +80%,-20% electrolytic 100pf 10wv ceramic 680pf f 10% ceramic 150pf f10% ceramic 15pf f 5% ceramic o.olpf +80%,-20% ceramic 220pf f 10% ceramic 470pf * 10% mylar 4700pf f 10% parts no. cq92m1 h223k ck45f 1 h103z cc45sl1 hoioc ck45d1 h102m ck45f1 h103z ck45dlh102m cc45sllh221 k cq92mlh223k cq92mlh223k ck45dlh102m ck45blh471 k cq92mlh102k cq92m1 h223k cq92mlh393k cq92mlh103k cq92mlh223k ck45blh471k cq92mlh103k ck45f1 h103z cc45ch1 h330j cc45ch 1 h070d cc45chlh020c ck45f1 h103z ce04wla101 ck45blh681 k cc45sllh151k cc45ch 1 h 150j ck45f 1 h103z cc45sl1 h221 k ck45b 1 h471 k cq92m1 h472k cq92mlh223k cc45sl1 h221 k cq92mlh102k cq92m1 h473k cq92m 1 h223k ce04w1 e4r7 cq92mlh682k ce04wlc100 cq92mlh393k ce04wlc100 cc45ch 1 h330j cq92mlh393k ce04wle4r7 ck45f1 h103z ce04w1 e4r7 ce04wlh010 ce04wla470 ce04wlc220 cq92mlh223k cq92mlh682k ce04w1 h010 ce04wla470 cq92mlh393k ce04wlc101 ck45f 1 h 103z ce04wlc100 cq92mlh682k cq92m1 h332k cq92mlh152k ce04wlh010 ce04wihr47 ce04w1 h010 ce04w1 hr47 ck45flh103z cc45sllhlolk cq92mlh682k ce04wlh010 ce04wla470 ck45f1 h103z ce04wlc100 semiconductor re- marks description carbon 4.7kcl . f5% 1/8w carbon 18kn f5% 1/8w carbon 330n ?5% 1/8w carbon lokn i5% 1/8w carbon 150n +5% 1/8w carbon 820n *5% 1/8w carbon 10kn f5% 1/8w q1, 2 q3 q4 q5 q6 ic1 ic2, 3 ic4 ic5-7 ic8, 9 lcl0 lcl i ic12 dl -3 mylar 0.022pf + 10% ceramic 220pf f 10% mylar looopf f 10% mylar 0.047pf + 10% mylar 0.022pf f 10% electrolytic 4.7pf 25wv mylar 6800pf f 10% electrolytic lopf 16wv mylar 0.039pf f 10% electrolytic lopf 16wv ceramic 33pf f 5% mylar 0.039pf +lo% electrolytic 4.7pf 25wv ceramic 0.01pf +?lo%.-20% electrolytic 4.7pf 25wv electrolytic 1pf 50wv electrolytic 47pf lowv electrolytic 22pf 16wv mylar 0.022pf ?lo% mylar 6800pf f10% electrolytic 1pf 50wv electrolytic 47pf lowv mylar 0.039pf ? 10% electrolytic 100pf 16wv ceramic 0.01 pf +80%,-20% electrolytic 10pf 16wv mylar 6800pf +lo% mylar 3300pf f 10% mylar 1500pf *lo% electrolytic 1pf 50wv electrolytic 0.47pf 50wv electrolytic lpf 50wv electrolytic 0.47pf 50wv ceramic o.olpf +80%,-10% ceramic loopf f10% mylar 6800pf f 10% electrolytic 1pf 50wv electrolytic 47pf 10wv ceramic 0.olpf +80%,-20% electrolytic 10pf 16wv :gks v03-0093-05 v03-0281-05 v03-0123-05 v01-0037-05 v03-0079-05 v30-0132-05 v30-0238-05 v30-0173-05 v30-0201-05 v30-0132-05 v30-0237.05 v30-0159-05 trimmericoilix'tal transistor 2sc458 (b) transistor 2sc1345 (e) transistor 2sc733 (y) transistor 2sa495 (y) transistor 2sc460 (b) ic td3400ap ic td3493bp ic mc4044p ic mc4016p(mc74416p) ic td3400ap ic td3474ap ic td341 oap tc 1 l1 l2 l3, 4 l5 l6-8 * a a a v30-0236-05 v11-0076-05 c054067-05 l77-0713-05 l40-i 51 1-03 l40-1021-03 l34-0438-05 l40-1021-03 ic td3420ap diode 151555 miscellaneous ceramic trimmer 25pf crystal oscillator 5.12 mhz ferri-inductor ferri-inductor coil 0.9ph ferri-inductor - - * e23-0046-04 e23-0047-04 indicator unlt (x54-1210-10) terminal x 5 terminal x 16 ref. no. r1-6 - v r 1 ic1-3 dl-6 - - - - - * parts no. r90-0510-05 rd14by2b471j r12-0048-05 v30-0195-05 v11-0458-05 e02-0101-05 e23-0047-04 e40-0611-05 e40-0613-05 e40-0616-05 rx unit (x55-m50-10) description resistor block 47061 x 4 carbon 470n f5% 118~ xl3 semi-f ixed resistor 100cl ic sn7447an led tlr-313 (c, d) ic socket x 6 terminal x 6 mini connector wafer x 6 mini connector wafer x 2 mini connector housing x 6 ref. no. r~. marks a * * parts no. description k capacitor ceramic 10pf f 0.5pf ceramic 22pf * 5% ceramic 33pf f 5% ceramic looopf f 20% ceramic o.01pf +80%,-20% ceramic looopf f 20% mylar 0.01 pf f 10% c 1 c2 c3 c4 c5 c6 c7 cc45ch 1 h 100d cc45ch 1 h220j cc45ch 1 h330j ck45dlh102m ck45f 1 hi032 ck45d1 h102m cq92mlh103k
parts list re- marks ref. no. c95 c96 c97 c98 c99 c100, 101 c102 description carbon 100a +5% 1/4w carbon ika + 5% 1/4w carbon 100a +5% 1/4w carbon ika +5% 1/4w metal film la +5% 1w carbon 560a +5% 1/4w carbon 56ka +5% 1/4w carbon 1ma +5% 1/4w carbon 150ka 25% 1/4w carbon 1ma +5% 1/4w carbon 15ka +5% 1/4w carbon 5.6ka +5% 1/4w carbon 10ka t5% 1/4w carbon 47ka 25% 1/4w carbon 22k.q +5% 1/4w carbon 47ka +5% 1/4w carbon 10ka +5% 1/4w carbon 47ka +5% 1/4w carbon 33ka + 5% 1/4w carbon 10ka 25% 1/4w carbon 6.8ka +5% 1/4w carbon 1ma +5% 1/4w carbon 270ka 25% 1/4w carbon 120ka +5% 1/4w carbon 68ka +5% 1/4w carbon iokn +5% 1/4w carbon 120ka +5% 1/4w carbon 270kn +5% 1/4w carbon 1ma +5% 1/4w carbon 10ka +5% 1/4w carbon 47ka +5% 1/4w carbon ika +5% 1/4w carbon 47ka +5% 1/4w carbon 470a f5% 1/4w carbon 5.6a t5% 1/2w carbon 10ka 25% 1/4w carbon 3.3ka +5% 1/4w carbon 4.7ka f 5% 1/4w carbon 560a t5% 1/4w carbon 33ka +5% 1/4w carbon 4.7ka +5% 1/4w carbon 47ka +5% 1/4w carbon 15ka +5% 1/4w potentiometer ref. no. r 72 r73 r74 r75 r76, 77 r78 r79 r80 r81-83 r84 r85 r86 r87.88 r89 r90 r91 r92, 93 r94 r95 r96 r97 r98 r99 r100 rlol r102 r103 r104 r105 r106 r107 r108 r109 fill0 rl i i r112 r113 r114, 115 r116 r117 r118 r119 r120 - ,::is parts no. rd14cy2elolj rd14cy2e102j rd14cy2elolj rd14cy2e102j rs14ab3aoioj rd14cy2e561j rd14cy2e563j rd14cy2e105j rd14cy2e154j rd14cy2e105j rd14cy2e153j rd14cy2e562j rd14cy2e103j rd14cy2e473j rd14cy2e223j rd14cy2e473j rd14cy2e103j rd14cy2e473j rd14cy2e333j rd14cy2e103j rd14cy2e682j rd14cy2e105j rd14cy2e274j rd14cy2e124j rd14cy2e683j rd14cy2e103j rd14cy2e124j rd14cy2e274j rd14cy2e105j rd14cy2e103j rd14cy2e473j rd14cy2e102j rd14cy2e473j rd14cy2e471j rc05gf2h5r6j rd14cy2e103j rd14cy2e332j rd14cy2e472j rd14cy2e561j rd14cy2e333j rd14cy2e472j rd14cy2e473j rd14cy2e153j parts no. ce04w1 a470 ck45f 1 hi032 ce04w1 h r47 ck45f1 hi032 ce04wlc100 ce04w1 h010 cc45sl1 hi01 k carbon 560a +5% 1/4w carbon lka +5% 1/4w carbon 4.7ka f 5% 1/4w carbon 15ka +5% 1/4w carbon 100a 15% 1/4w carbon 4.7ka f 5% 1/4w carbon 56ka +-5% 1/4w carbon 100ka f 5% 1/4w carbon 56ka f 5% 1/4w carbon 150ka f 5% 1/4w carbon 22ka +5% 1/4w carbon 18ka f5% 1/4w carbon 5.6ka f 5% 1/4w carbon 22ka f 5% 1/4w carbon 2.2ka f 5% 1/4w carbon 47a +5% 1/4w carbon i kk2 25% 1/4w carbon 47ka +5% 1/4w carbon 22ka +5% 1/4w carbon 2.2kr +5% 1/4w carbon 4.7ka +5% 1/4w carbon 330a +5% 1/4w carbon 5.6ka f 5% 1/4w carbon 22ka +-5% 1/4w carbon 100a + 5% 1/4w carbon 47a +5% 1/4w r42 r43, 44 r45, 46 r47 r 48 r 49 r50 r51 r52 r 53 r54 r55 r56 r57 r58 r59 r60, 61 r62 r63 r64 r 65 r 66 r67 r68, 69 r 70 r71 1 vr1 i r12-4016-05 i semi-fixed resistor 50ka vr2, 3 r12-3025-05 semi-fixed resistor 10ka semiconductor description electrolytic 47pf iowv ceramic o.01pf +80%,-20% electrolytic 0.47pf 50wv ceramic o.01pf +80%,-20% electrolytic 10pf 16wv electrolytic imf 50wv ceramic ioopf + 10% resistor carbon 100kfl f 5% 1/4w carbon 82ka +5% 1/4w carbon 100a ?5% 1/4w 150a +5% 1/4w carbon 100ka +5% 1/4w carbon 47.0- +5% 1/4w carbon 100a +5% 1/4w carbon 3.3ka +5% 1/4w carbon 15ka +5% 1/4w carbon 4.7ka +5% 1/4w carbon 150a +5% 1/4w carbon 330a +5% 1/4w carbon 33ka +5% 1/4w carbon 4.7ka +5% 1/4w carbon 1 ka f 5% 1/4w carbon 3.3ka +5% 1/4w carbon 1.5ka +5% 1/4w carbon 18ka +5% 1/4w carbon 100ka +5% 1/4w carbon 3.3ka +5% 1/4w carbon 5.6ka + 5% 1/4w carbon 33ka +5% 1/4w carbon 560a + 5% 1/4w carbon 680a *5% 1/4w carbon 270ka +5% 1/4w ika 25% 1/4w carbon 15ka +5% 1/4w carbon 5.6ka + 5% 1/4w ika +5% 1/4w carbon 2.2ka f 5% 1/4w carbon 4.7ka f 5% 1/4w carbon 100ka *5% 1/4w carbon 470a +5% 1/4w carbon 3.3ka f 5% 1/4w carbon 10ka f 5% 1/4w carbon 4.7ka +5% 1/4w carbon 470r +5% 1/4w r1, 2 r 3 r4, 5 r6 r7, 8 r9 r10 r11 r12 r13 r14 r15 r 16 r17 r18 r 19 r20 r21 r22 r23 rd14cy2e561j rd14cy2e102j rd14cy2e472j rd14cy2e153j rd14cy2elolj rd14cy2e472j rd14cy2e563j rd14cy2e104j rd14cy2e563j rd14cy2e154j rd14cy2e223j rd14cy2e183j rd14cy2e562j rd14cy2e223j rd14cy2e222j rdllcy2e470j rd14cy2e102j rd14cy2e473j rd14cy2e223j rd14cy2e222j rd14cy2e472j rd14cy2e331j rd14cy2e562j rd14cy2e223j rd14cy2eiolj rd14cy2e470j rd14cy2e104j rd14cy2e823j rd14cy2elolj rd14by2e151jcarbon rd14cy2e104j rd14cy2e470j rd14cy2eloij rd14cy2e332j rd14cy2e153j rd14cy2e472j rd14cy2e151j rd14cy2e331j rd14cy2e333j rd14cy2e472j rd14cy2e102j rd14cy2e332j rd14cy2e152j rd14cy2e183j rd14cy2e104j rd14cy2e332j rd14cy2e562j ~"3 fet 3sk40 (l) or 3sk41 (l) fet 3sk41 (l, m) transistor 2sc460 (b) transistor 2sc1000 (gr) transistor 2sc460 (6) hi-bread lc h8d5022 i c ta7120p transistor 2sc458 ('3) transistor 2sc1000 (gr) transistor 2sc734 (y) transistor 2sd235 (y) transistor 2sc458 (b) transistor 2sa495 (y, 0) transistor 2sc458 (8) transistor 2sc1000 (gr) transistor 250458 (b) transistor 2sc496 (y, 0) transistor 2sc458 (b) transistor 2sc945 (or) diode 1 n60 diode is1555 01 02 03, 4 05, 6 07-10 ql i q12 q13, 14 q15 q16 01 7, 18 019 20 02 1 022, 23 024, 25 026 027, 28 029 030 d1.2 d3-6 rd14cy2e333j v09-0081-05 v09-0057-05 v03-0079-05 v03-0299-05 v03-0079-05 v30-0143-05 v30-0138-05 v03-0093-05 v03-0299-05 v03-0126-05 v04-0046-05 v03-0093-05 v01-0037-05 v03-0093-05 v03-0299-05 ~03-0093.05 v03-0336-05 v03-0093-05 v03-0270-05 v11-0051-05 v11-0076-05 r26, 27 rd14cy 2e561 j ::: i r28 r29 r30 r31 r32 r33 r34 r35 r36 r37 r 38 r39 r 40 r41 rd14cy2e681j rd14cy2e274j rd14cy2e102jcarbon rd14cy2e153j rd14cy 2e562j rd14cy2e102jcarbon rd14cy 2e222j rd14cy2e472j rd14cy2e104j rd14cy2e471 j rd14cy2e332j rd14cy2e103j rd14cy2e472j rd14cy2e471j
parts list i ref. no. parts no. 1 description diode 1 n60 diode is1555 diode 1 n60 diode is1555 zener diode wz-090 diode 1 n60 re- marks ref. no. parts no. tantalum 0.1pf 35wv electrolytic 10pf 16wv electrolytic 47pf iowv mylar iooopf 210% electrolytic 1pf 50wv ceramic 0.01pf +so%,-20% electrolytic 10pf 16wv ceramic 0.01pf +so%,-20% electrolytic 0.47pf 50wv ceramic 0.01pf +so%,-20% ceramic 22pf f 5% ceramic 0.01pf +80%,-20% electrolytic 47pf iowv ceramic 0.01pf +so%,-20% ceramic iooopf f20% ceramic lopf f0.5pf ceramic 0.01pf +so%,-20% ceramic 1000pf f 20% ceramic 10pf f 0.5pf ceramic 1000pf f 20% ceramic 0.01pf +80%,-20% ceramic 5pf f 0.5pf description i coil i ant coil helical block i ft monolithic filter i ft ceramic filter ceramic filter i ft tuning coil ferri-inductor crystal oscillator 10.245mhz ferri-inductor discri coil (d) discri coil (e) ferri-inductor input transformer i resistor miscellaneous carbon carbon carbon carbon carbon carbon carbon carbon carbon carbon carbon carbon carbon carbon carbon e23~0047-04 e40-0611-05 - rd14cy2e473j carbon rd14cy2e103j carbon rdi~cy 2e333j carbon rd14cy2e103j carbon rd14cy2e563j carbon rd14cy2e103j carbon rd14cy2e473j carbon rd14cy 2e682j carbon rd14cy2e333j carbon terminal x 31 mini connector wafer :e& electrolytic 10pf electrolytic 47pf tantalum 0.1pf ceramic o.ol@f electrolytic 4.7pf electrolytic 47pf ceramic 5pf electrolytic 1pf 16wv 1 owv 35wv +so%,-20% 25wv i owv +0.5pf 50wv - - - - r11 tx unit (x56-1230-10) r12 r 13 +lo% f 10% f 10% f 5% f0.5pf f 10% f 5% +so%,-20% f 5% ? 20% f 5% + 5% +80%,-20% f 5% f o.5pf f 0.25pf f 5% f 0.25pf f 5% + 5% +so%,-20% iowv f01-0150-14 f07-0313-14 f20-0078-05 f29-0014-05 ref. no. cq92m1 h103k cq92m1 h393k cq92m1 h473k cc45ch 1 h330j cc45ujlh050d cc45sl1 hz21 k cc45ch 1 h220j ck45f1 h103z cc45ch1 h330j ck45d1 h102m 'cc45th1 h220j cc45ch1 h330j ck45flh103z ck45th1 h220j cc45ch 1 h050d cc45sl1 hor5c cc45thlh150j cc45sllhor5c cc45th1 h 150j cc45chlh470j ck45flh103z ce04wla470 rd14cy 2e472j carbon rd14cy2e102j carbon rd14cy 2e473j carbon rd14cy2e332j carbon rd14cy2e222j carbon rd14cy2e154j carbon rd14cy2e104j carbon rd14cy 2e103j carbon rd14cy2e681j carbon rd14cy2e471j carbon rc05g f2h5r6j carbon rd14cy2e561 j carbon rd14cy2e471j carbon rd14cy2e682j carbon rd14cy2e471j carbon rd14cy2e561j carbon rd14cy2e681 j carbon rd14cy2e103j carbon rd14cy2e 153j carbon rd14cy2e100j carbon rd14cy2e470j carbon rd14by2e102j carbon heat sink shield cover insulation plate x 2 r 8 insulation washer x 2 r 9 - r10 mylar 0.01pf mylar 0.039pf mylar 0.047pf ceramic 33pf ceramic 5pf ceramic 220pf ceramic 22pf ceramic 0.01pf ceramic 33pf ceramic 100opf ceramic 22pf ceramic 33pf ceramic 0.01pf ceramic 22pf ceramic 5pf ceramic 0.5pf ceramic 15pf ceramic 0.5pf ceramic 15pf ceramic 47pf ceramic 0.01pf electrolytic 47pf r16 capacitor r17 parts no. description r 14, 15
vri, 2 vr3 vr4 vr5 tci tc2-4 ref. no. r54 potentiometer semi-f ixed resistor 5ksl semi-fixed resistor 500sl semi-f ixed resistor 50ksl semi-fixed resistor 500sl parts no. rd14by2eiolj ceramic trimmer 20pf ceramic trimmer 20pf q6-8 q9 q10 qll, 12 01 3 q14 q15 dl-5 d2-5 d6, 7 d8 d9 dl0 d11, 12 description carbon loosl ?5% 1/4w semiconductor re- marks ic transistor fet transistor transistor transistor transistor fet transistor transistor diode diode diode zener diode diode zener diode diode i coil i miscellaneous i i - ferri-inductor choke coil 30~h variable inductor 15~h choke coil 10~h crystal oscillator 10.715 mhz ferri-inductor i ft tuning coil ferri-inductor tuning coil tuning coil tuning coil vhf coil 645 5t ferri-inductor vhf coil 645 6t vhf coil 645 4t vhfcoil 3~4t vhfcoil 6@4t choke coil (with 100sl) vhf coil 36 6t a accessories suppll ed j1 - - - - i 1. dynamic microphone equipped with 4-pin plug (t91-0302-05) . . . . . . . . . . . . . 1 piece 2. mounting bracket (j21-0941-02) . . . . . . . . 1 piece 3. mounting parts screws, 6mm diameter (n09-0008-04) . . . . . 4 pieces plain washers, 6mm diameter (n 15-1 060-46) 4 pieces spring washers, 6mm diameter (n16-0060-41) 4 pieces nuts, 6mm diameter (n14-0009-04). . . . . . 4 pieces 4. stand-off bracket (j01-0021-04) . . . . . . . . 1 piece 5. label ... . . . . . . . . . . . . . . . . . . . . . . . . i sheet 6. spare fuse, 10a (f05-1031-05) . . . . . . . . . 1 piece 7. dc power cord with plug and fuse . . . . . . 1 piece 8. lbliniature plug for external speaker and touch tone pad (e12-0001-05) . . . . . . . . . 2 pieces 9. plug-equipped pc board for tone squelch . . 1 sheet 10. operating manual (b50-2515-00) . . . . . . . . 1 copy packing el 8-0307-1 5 ?23-0046-04 ?23-0047-04 fo2-0030-05 f02;0401-05 operating manual (650-251 5-00) monofolk socket terminal terminal x 26 heat sink (for 014) heat sink (for 015) protection cover (hz5 0079 04) polyethylene bag buffer f~xture (h10-1206 14 (h25 0029 04) styrene foam cushion (h 10-2502-02)
w disassembly ' removing the case (refer to fig. 6) 1. remove thescrews@-- @. 2. remove the upper and lower cases. case (a) (a01-07031$2) i om-- bind screw (n35-3006-45) case (b) i (~01-0704-12) 8 @ fig. 6 removing the case removing the panel (refer to fig. 7) 1. remove the knobs. remove the screws @ --@. remove the panel and the subpanel in fact, this board is constructed with panel (a20-2301-05) knob (squ) (k21-0703-04) knob (vol) (k2 1-0704-04) fig. 7 removing the panel
disassembly removing the indicator (refer to fig. 8) 1. remove the cases. 2. remove the panel. 3. remove the screws@, @and remove the front glass. 4. pull out the necessary part of the indicator upward. blinding plate a (f19-0601-04) / blinding plate b (f 19-0602-04) ,r fm transceiver mhz , 00~~1~ +600 , , 0 -600 front glass (810-0601-04) removing the final section (refer to fig. 9) fig. 8 removing the indicator 0 removing the tx unit (refer to fig. 10) 1. rernove the leads @ and @ from the terminal pins. 1. remove the leads @ and @from terminal pins. 2. remove the screws@-w. 2. remove the screws 0-0. 3. pull f~nal section out. 3. lift tx unit up in the direction of arrow. ? out '. n88-3006-46 x 4 % fig. 9 removing the final section & \ n87-3006-46 x 5 %3 fig. 10 removing the tx unit o 0 -.
disassembly ~exegonal boss (j32-0704.04) pc board fig. 11 disassernblying the sub panel to removing led mother board 1. remove knobs and front panel. 2. loosen sqivol control knob. 3. remove all led display. 4. remove 4 screws on each corner of mother board j25-2513-03. 5. remove 2 connectors on board. 6. gently push to rear and lift up.
i rounlesnoottng (pllj transmission/reception is sometimes or totally impossible. + unlock indicator normal troubleshooting check voltage and for others - frequency at tp3 of vco unit. trouble in pll circuit condition (2) (.$ service point 1) 5v supply at avr circuit (main body) 2) vco ampiifier 1) vco unit 2) pd unit. -- vco unit 1) voltage at 9v terminal. 2) rf voltage at tp2. 3) vco frequency 4) local osc level - pd unit 1) waveform and frequency at tpi. 2) output from 12-pin of ic3. 3) puta 135.3mhz signal of ssg into tpi of vdo unit. malfunction in transmitter possible cause no 5v supply due to malfunc- tion in lclol and 0101. 01 2 and l15 broken poor contact in wiring, parts, etc. poor contact in wiring, parts, etc. poor contact in wiring, parts, etc. l1 crystal broken. 010, i i broken. 018, 02, 3 or crystal broken. tc1 shifted tc4 shifted - - - .... -.. .- . crystal or ic1 broken. ic2, 3 broken. . ic4 (mc4044p) or ic5 - 12 broken. measures (remedy) . checkvottage and replace trans- former. check voltage and replace trans- former coil. . check voltages, etc. . check voltages and replace l16, 17 crystal. . check voltayes. check voltages and replace l1 crystal. check voltages. check voltages and replace de- fective parts. adjust it. adjust it. - check waveform and frequency, and replace defective parts. check waveform and frequency, and replace defective parts. . check waveform andfrequency, and replace defective parts. check waveform at each part. remedy replacement check check replacement replacement symptom (1) no power output. l cause a: when current drain is more than 2a during transmis- sion. el, 02, d2, or d3 defective in pa unit. insufficient continuity in antenna line. 6: when current drain is about 1.2a during transmission. coaxial cable defective between pa unit and tx unit (in par- ticular, connecting part.) 01 defective in pa unit. tx unit malfunction.
(2) low power. k lmproper adjustment in protection circuit. tr defective in final driver stage. readjustment replacement symptom (3) defective deflection at rf meter (under normal power supply. (4) excessive power range. cause abnormal voltage in avr (2sd235). improper adjustment for trimmer in pre-driver stage. (5) hi- low switchover malfunc- tion. remedy check readjustment antenna swr defective. lmproper adjustment for vr1 in pa unit. check readjustment a: when tx unit is normal. ) lmproper adjustment for tc1 - tc4 in pa unit. b: when tx unit has a band. lmproper adjustment for tc1 - tc4 in tx unit. lmproper adjustment for vr61 - vr63 in main-body choke printed circuit board. readjustment readjustment readjustment poor contact in hi-low switch. lmproper adjustment for vr5 in tx unit. 01 2 defective in tx unit. replacement readjustment replacement (6) consumption current devi- ating from 4a (approx.) at 144 mhz without antenna connection. 04 defective in pa unit. lmproper adjustment for vr3 in pa unit. defective in tx unit. replacement readjustment readjustment (7) large spurious. a: for near-by spurious. lmproper adjustment for l7, l8 in tx unit. lmproper adjutsment for l11 - l14 and vr3 in tx unit. lmproper adjustment for vr61 - vr63 in main-body choke printed circuit board. b: for harmonics spurious. lmproper adjustment for tc1 - tc4 in pa unit. readjustment readjustment readjustment readjustment replacement check replacement 6 (8) transmitlreceive change- ' microswitch broken. over malfunction poor contact at mic terminal 1 relay defective (rl101). (9) modulation impossible. replacement check replacement replacement mic element defective. poor contact at mic terminal. sw of main body and 071 of printed circuit board defective. 01 defective in tx unit. (1 1) tone burst malfunction. readjustment i lmproper adjustment for vri, vr5 in tx unit (in the case of insufficient modulation). (10) tone squelch insertion of printed circuit board of active filter (in tx setting) in rx unit . active filter defective. 01 1 defective in rx unit. note: if modulation degree is improper, adjust it with vr31 of rf unit. a- 06 - 08 defective in tx unit or piezo tuning fork broken. lmproper adjustment for vr4 or trouble in c41, d6 in the case of abnormal time constant. check replacement replacement replacement readjustment or replacement
malfunction in receiver malfunction in others remedy set squelch to off. set itto off. check voltages. check check check readjustment replacement readjustment symptom (1) no noise. (2) low sensitivity cause squelch in on setting. tone switch set to tone squelch position. malfunction in audio circuit. speaker lead wires defective. (in particular, connecting parts). ear phone jack broken. antenna system defecitve (m-type connector, antenna wires, etc.) rf cavity tuning shifted. d6 defective in vco unit. improper adjustment for l9 in rx unit. (3) defective deflection at s meter. (4) noise generated, but recep- tion impossible. remedy check replacement replacement check check check provide fuses. check replacement check. symptom (1) f display led not lit or letter trouble. \ (2) no power supply. (3) fuses blowing out. cause no 5v avr output led defective. driving ic (ic1 - ic3) defective. rotary switch for f in trouble. poor contact around sockets in display and led printed circuit boards. poor contact between pin and connector with lead wire of display printed circuit board. no fuse in fuse holder. disconnection or improper soldering in power cable. power switch broken. power circuit connected reversely. meter defective. improper adjustment for vr1 for meter sensitivity adjustment. 10.245 mhz (l1 1) crystal defective. each tr defective in receiver (rf and if stages). improper adjustment for each coil in receiver (rf and if stages). replacement readjustment replacement replacement readjustment (5) squelch malfunction. (6) zzz.. . noise generated with squelch switched on and in the mode of tx + rx. (7) tone squelch malfunction (in rx setting). (8) howling caused near af vr max. (9) howling near af vr max. tone squelch set to on position. noise amplifier malfunction or 012,013 defective in rx unit. improper adjustment for vr2 in rx unit. set it to off. replacement readjustment dl 5 defective in rx unit. lmproper insertion of printed circuit board of active filter in rx unit. 011, 019 - 21, or dl 1 - dl4 defective in rx unit. insufficient tightening of bolts for case, printed circuit boards, speaker, etc. c16 coming too close to c22 in vco unit. vco coil is loose on coil form. replacement check replacement check separate them. reseal with glue.
b transmitter section b- level diagrp ii 0.3 (rx) i < , 0.5 (tx) .a i i i 1 oomv i 0.02 pf (audio section : 1pf "---i+- to rnea fc: 146.0 mhz fs: 1 khz mode: r5 k~z dev 80 1 oopv 7
lam i out i i condition i t~67it::z ---i hi receiver section disc i f - af. 1 1 455 mhz 1 1 1 khz 1 m 50 rnw l /-i i pf) i i i i 1 i i y easurernent polnt i 0 i +i 1 i i-, i i i i i * i i i i i j 1 i i i i i i i '& i local osc level (146 mhz) lr -0.7 v tp2 - 0.9 v ? r
pa unlt (x45-1090-10) rx unlt (x55-1150-10) vr2 vr3 filter e front panel pa unlt (x45-1090-10) tx unlt (x56-1230-10) vr5 vr3 i pd unlt 1x50-1380-10) (x54-1210-10) front panel
adjustments test equipment required 1. frequency counter frequency range: up to 150 mhz or more 2. ssg (standard signal generator) capable of generating frequencies centering on 145 mhz, variable in amplitude, and also of frequency modulation. output voltage: -10 db-100 db am : 30% modulation at 1 khz fivi: 7.5 khz (1 khz) 3. oscilloscope high-sensitivity oscilloscope, with external synch. 4. af vacuum-tube voltmeter frequency range: 50 hz-10 khz lnput resistance: 1 megohm minimum voltage range: f.s. =3 mv up to 30 volts 5. r f vacuum-tube voltmeter frequency range: 150 mhz or more 6. vacuum-tube voltmeter lnput impedance. 10 megohms or more voltage range: f.s. = 0.1 up to 1000 volts, ac and dc. 7. power meter power range: f.s. = 50w, 20w, 3w at 150 mhz or more input impedance of the meter should be 50 ohms. 8. linear detector frequency range: 150 mhz or more frequency deviations: 10 khz or more the detector need not be used where high accuracy of measurement is not required. 9. ag (audio generator) oli tput: 300 hz-5 khz output voltage: 0.5 mv-1 v 10. af dummy load 8 ohms and 3 watts approximately. 11. dc regulated power supply voltage range: 9 v-16 v current range: 10a or more ,d 12. sweep generator center frequency: 145 wlhz frequency deviation: maximum t5 khz output voltage: more than 0.1 v sweep rate: at least 0.5 sec./cm 13. center meter input sensitivity: 50 pv or so 14. detector construct the following circuit: 22p ln- out i fig. 12 detector adjustment of the TR-7400A 1. adjustment of pll 1.1 test equipment used (1) rf vtvlm (2) frequency counter (3) dc voltmeter (4) dc power source 1.2 preliminary ck of vco & pll tcz tc3 vco unit if this check is performed successfully, it is not necessary to perform sec. 1.3 step 1-1 1. it should be stressed not to turn factory sealed parts. 1. set TR-7400A to 146.00 mhz simplex. 2. adjust vr1 on vco to measure 9.00v at 9v terminal. 3. adjust tc1 inside metal box on vco to read 5.00v at cv terminal. 4. check for 2.560000 mhz +20 hz at tp1 on pll board adjust tc1 if necessary (must use 33 pf cap at tp1). 5. measure frequency at lr terminal on vco. adjust tc3 for 135.3000 mhz floo hz. adjust tc2 for 135.3050mhz f 100hz with 5kiocontrol in 5k position. 6. to set tx final frequency tx and adjust l3 on tx board for final frequency. 1.3 adjustment the vco unit (x50-1370-10) (1) set the frequency to 146.000 mhz. set the other controls at any positions. (2) adjust the dc voltage across the 9-v terminal to 9 v (8.8 - 9.2v) with vr1.
(3) connect the vtvm to terminal tp2 and adjust the core of l10 180' counterclockwise from the point where oscillation begins. rf voltage of tp2 = 0.7 - 1 v (4) adjust the core of l11 so that the rf voltage across terminal tpi is maximum. rf voltage at tpi = 0.1 5 - 0.3v (5) adjust the core of l11 so that the rf voltage at terminal pi is maximum, and then readjust the core of l4. rf voltageat pi = 1 -2v (6) adjust tc1 so that the dc voltage terminal cv is 5 v. note: the pll will work properly after steps (1) - (6) and the unlock indicator on the panel will go off. (7) adjust the core of l15 so that the rf voltage at terminal lr is maximum. rf voltage at lr = 0.3 - 1 v (8) adjust tc1 so that the frequency at tpi (measured through 33 pf) in the pd unit (x50-1380-10) is 2.560000 mhz f20 hz. (9) measure the frequency at terminal lr. tc3: 135.3000 mhz "00 hz tc2: 135.3050 mhz +i00 hz with 5k/0 control set at 5k adjust the frequency as noted above. (10) set the mhz control to 5, adjust the cores of l4 and 11 so that the rf voltage at terminal pi is maximum reset the nlhz control to 7 and adjust tc4 so that the rf voltage is 1.7v. repeat these adjustments three times because the adjustment of tc4 affects with the setting of l4 and 11. (1 1) set the mhz control to 6. give the core of l15 three turns in the clockwise direction (put the core to middle' of the form) so that the rf voltage at terminal tp2 in the rx unit (x55-i 150-10) is maxi- mum, and then adjust l-9 in the rx unit. repeat the adjustment three times or so because both coils are mutually related. rf voltage at tp2 of rx unit = 0.8 - 1.2 v i vrl 111 l5 l3 1 tpl i " rx unit 1.4 check point (1) unlock circuit and its indicator. a. when tpi of vco unit (x50-1370-10) is grounded with controls set arbitrarily. (a) the unlock indicator on the panel should light. (b) the rf voltage at tp2 of the rx unit (x55- 1150-10) should be attenuated by 20 db or more. b. when the mhz control is turned rapidly, the un- lock indicator should go on and off. (2) frequency setting and its digital display circuit a. when the mhz control is turned from 4 to 7, the frequency at terminal tp2 of the rx unit (x55- 1150-10) should vary in steps of 1 mhz. b. when the 100 khz control is turned from 0 to 9 with the mhz control set at 7, the frequency at tp2 of the rx unit should vary in steps of 100 khz. c. when the 10 khz control is turned from 0 to 9 with the 100 khz control set at 9, the frequency at tp2 of the rx unit should vary in steps of 10 khz. (3) repeater circuit (f600 khz tx shift) and its indi- cator set the frequency as given below. 145.99 147.00 when the repeater switch is set at -600 or +600 and at off (simp), frequency should be differ by 600 khz only in the transmission mode. (frequency tolerance: within +-i00 hz) check the frequency at tp3 of the vco unit (x50-i 370-10). 2. adjustment of rx unit 2.1 test equipment used (1 ) dc power source (2) sweep generator (3) oscilloscope (4) jig for helical stage (5) rf vtvm (6) ssg (7) ag (8) af vtvm 2.2 helical adjustment (1) ground tp2 and terminal le of the vco unit (x50- 1370-1 0). (2) connect the detector for helical adjustment to tpi of the rx unit. (3) looking at the waveform appearing on the oscillo- scope, make adjustment in the following way. adjust l1 and l2 (3 piston trimmers) alternately so that the markers appear as shown fig. 14. 3 5
note 1: adjust thecore of l1 so that the waveform is symmetrical. note 2: the waveform should have three peaks. note 3: adjust carefully so that the waveform is symmetrical. (4) remove the wire used to ground terminal le. note: see "adjustment of pll". (1 1) for the adjustment of l10. fig. 13 helical adjustment sweep generator osc 9 p 000 0 i i fig. 14 helical output waveform h out rf out hi i l 2.3 sensitivity adjustment " (1) setting (a) adjust the source voltage to 13.8 v (b) set dev of ssg to k5 khz. (.c) set modulation frequency of ssg to 1 khz. (d) set controls as given below: 146.00 sqvr : turn counterclockwise fully tone switch: off (el observe af output across 8-ohm dummy connected to ext sp. (2) receive 146.0 mhz (10 -- 20 db) from ssg. adjust the tuning knob of the ssg for maximum s meter deflection. (3) adjust a piston trimmer at the output side of l2 of the rx unit alternately with l3, l5 and l8 for maximum s meter indication. 2.4 discriminator adjustment rxa @ (1) adjust l13 and l14 of the rx unit repeatedly for maximum af vtvm indication. (2) disconnect the ssg output and connect a center meter to terminal cm. adjust l14 alone so that the center meter indicates "0" / ssg tp1 detector dummy t' load fig. 15 sensitivity adjustment 2.5 squelch adjustment (1) set the sou knob at the i i-o'clock position and without receiving any signal, adjust vr2 of the rx unit so that reception noise just diminishes (by turn- ing it in the diminishing direction). (2) when a signal of -6 db is applied from the ssg, the squelch should open. 2.6 s meter adjustment .&jj (1) set the ssg's output to 30 db. fine-adjust the ssg's tuning knob again for maximum s meter indication. (2) adjust vr1 of the rx unit so that the s meter indicates "1 0" 2.7 sensitivity measurement 0 20 db noise qu~eting sensltlvlty: 0.7 pv or better 0 sin 40 db or more at 40 db (1 mv) of input (1 khz, 70% modulat~on) \,- , 2.8 checking tone squelch operation (1) connect ag to ssg in order to operate ssg in exter- nal modulation. with ssg output set to 0 db, apply ag signal of k0.5 khz dev. at 151.4 hz. (2) connect a 151.4 hz active filter to the active filter socket of the rx unit. (3) tune the ssg to 146.0 mhz. make sure that recep- tion is possible even when the tone switch is set to so. make sure that reception becomes impossible when external modulation has been cut off. after checking, the test equipment should be dis- connected.
3. adjustment of tx unlt techniciansshould be encouraged not to turn factory sealed transformers but to check each stage for output. 3.1 test equipment used (1 ) power source: (2) power meter (3) frequency counter (4) linear detector (5) ag (6) rf vtvm 3.2 adjustment of 10.7 mhz (1) setting (a) adjust frequency to 145.5 mhz and turn off the repeater switch. (b) remove drive to final at "out" of tx unit. (2) connect the frequency counter to tpi of the tx unit. key the transmitter and adjust l3 so that it read 10.700 mhz (10.7 mhz +200 hz). (3) connecting the rf vtvm to the same tpi, adjust l7 and l8 for maximurn indication. the core of l7 should be in the center of the core. tx unlt l13 0 soc&t for tone burrr pc board for choke m 3.3 adjustment of mix stage (1) connect the rf vtvm to tp3 of the tx unit and key the transmitter. adjust lll, l12, l13, l14, tcl and tc2 repeatedly for maximum indication. (2) set the frequency to 144.5 mhz and adjust vr6l on the choke circuit board for maximum indication. (3) set the frequency to 146.5 mhz and adjust vr62 for maximum indication. (4) set the frequency to 147.5 mhz and adjust vr63 for maxlmum indication. 3.4 adjustment of predrive (1) set the frequency to 146.0 mhz and connect the power meter to the out terminal of the tx unit (50 ohms). (2) adjust tc3 and tc4 of the tx unit for maximum indication. the output level should then be 1.3 w or more. 3.5 adjustment of tone burst time (1) set the tone switch to bru. connecting an oscillo- scope to tp2 of the tx unit in reception mode, plug a tone burst oscillating element of 1,800 khz into the tone burst socket. (2) watching the waveform on the oscilloscope, make surethatthe level is about.0.12 v with the af vtvm. (3) watching the waveform, make sure that it diminishes about 0.5 second after the transmitter is keyed. if the delay is not as specified, adjust vr4 of the tx unit. lower side vr5 tx unit rx unit fig. 16 adjustment of pa section, rf meter and low power
adjustments 3.6 adjustment of pa unit (1) connect the 50w wattmeter to the ant terminal (type mi. (2) connect the lead which connects the pa unit with -tr~e tx unit to out of the tx unit. (3) set the frequency to 146.0 mhz. set the hi/low switch to hi. (4) key the transmitter and adjust tc4 of the tx unit, tci, tc2, tc3 and tc4 of the pa unit for maxi- mum indication. note 1: vr3 of the pa unit shall be turned fully counterclock- wise. note 2: the maximum power shall be 28 w or more. (5) set the frequency to 146.5 - 147.0 mhz, and adjust tc2 for maximum power output. it should be done to make the output at 147.9 mhz greater than that at 144.9 mhz. make sure of the difference in power at 144.9 mhz and 147.9 mhz. (6) the power should be 25 w or more at hi in between 144.0 and 148.0 mhz. pa unlt 1x45-1090.10) pa unlt (x45-1090-10) i 1 3.7 adjustment of rf meter adjust vr1 of the pa unit so that the rf meter indicates "8" at 146.0 mhz, hi power position. 3.8 adjustment of low power (1) set the frequency to 147.9 mhz and the hi/low switch to low. adjust vr5 of the tx unit so that the power meter indicate 9.0 w. (2) adjust vr1 of the display unit so that the power meter indicate 9.0 w at the frequency of 144.0 mhz with the hiilow switch set at low. (3) the power should be 8-15 w at low position in between 144.0 and 148.0 nihz. 3.9 adjustment of dev (deviation) switch to sq, adjust vr3 of the rx unit so that dev become +-i khz. note: an active filter is needed as a jig. 3.10 adjustment of protection circuit (1) connect a dc voltmeter of 1 - 0.3 v range to terminal tp (on the filter circuit board). adjust vr2 for minimum indication at a frequency of 146.0 mhz and the hi setting. (2) set the frequency to 144.0 mhz and remove the watt- meter. adjust vr3 quickly so that current consump- tion become 4 a. power meter directional coupler linear detector llnt i oscilloscope af vtvm i jq fig. 17 adjustment of dev (deviation) (1) transmitting 146.0 mhz at low and modulating it with microphone input of 1 khz and 30 mv, adjust j vr2 of the tx unit so that dev become f5 khz. (2) similarly, adjust vr1 of the tx unit so that 3ev become f3.5 khz at a microphone input of 3 mv (3) removing microphone input and setting the tone
adjustments reference data example 1 tx mic input level vs devlatl dummy ant. imp. 50f2 1 3 5 10 100 mic input level in rnv example 2 rx signal to noise ratio, output level vs antenna input voltage example 3 rx s-meter sensitivity 10 a--144.00 mhz x-~146.00 mhz 9 0-0147.99 mhz 8 ru 7 -i q 0 6 v) + 3 2 1 0 10 pv 100 pv antenna input voltage
schematic diagram
schematic diagra
fs.7805 output input 2sc496 iy. 01 =a496 iy. 01
TR-7400A terminal l lp pi cv lr lt bas 5 k 0 k le ct 1 ct2 ts rs ma0 c9 cb tbb tt i txb txl b a pro sb vct st sm i sp rxa sqb tsbz ts ti0 rs cm tso sq ts l a1 sqk low power low power programmable l nput control voltage local rx local tx base of transistor crystal for 5 khz up crystal for 0 khz lock error control terminal no. 1 control terminal no. 2 tx switching rx switching mic amp output common 9 v common b line tone burst b line touch tone input tx b line tx lamp (on a~r) base oc transistor protection stabilized b line voltage control tuning stand-by s meter speaker rx antenna squelch b line , tone squelch b line tx switching tx 10 volt l~ne rx switching center meter tone squelch output squelch control tone squelch larnp af output squelch control

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