92 europe basingstoke, uk 01256 812812 australia queenstown, australia 61-8-8240-2244 canada guelph, ontario (519) 822-2960 st. laurent, quebec (514) 343-9010 usa cheektowaga, ny (716) 630-7030 ? www.hammondmfg.com push - pull audiophile - output (1608-1650 "a" series) push - pull "easy hook-up" "classic" tube type - ultra-linear output transformers new & improved version of our 1608-1650 series output transformers (re-designed secondaries for easy hook- ? up of secondary loads) designed for push-pull tube output circuits. ? enclosed (shielded), 4 slot, above chassis type "x" mounting. ? frequency response 30 hz. to 30 khz. at full rated power (+/- 1 db max. - ref. 1 khz) minimum. except the ? 1650e (70 hz. to 30 khz. +/- 1 db max. - ref. 1 khz.) insulated fexible leads 8" min. ? all units (except the 1650g) include 40% screen taps for ultra-linear operation (if desired). ? typical applications - push-pull: triode, ultra-linear pentode, and tetrode connected audio output. the 1650g ? does not have primary screen taps and will not support "ultra-linear" applications. part number audio watts (rms) primary impedance max. dc per side secondary impedance dimensions (inches) wt. lbs. a b c d e +/- 1/16 g slot 1608a 10 8,000 c.t. 100 ma. 4-8-16 2.50 2.75 3.06 2.00 1.69 .203 x .38 2.5 1609a 10 10,000 c.t. 100 ma. 4-8-16 2.50 2.75 3.06 2.00 1.69 .203 x .38 2.5 1615a 15 5,000 c.t. 100 ma. 4-8-16 2.50 3.25 3.06 2.00 2.19 .203 x .38 3.25 1650e 15 8,000 c.t. 100 ma. 4-8-16 2.50 3.25 3.06 2.00 2.50 .203 x .38 3.5 1620a 20 6,600 c.t. 158 ma. 4-8-16 2.50 3.50 3.06 2.00 2.44 .203 x .38 3.5 1650fa 25 7,600 c.t. 128 ma. 4-8-16 2.50 3.50 3.06 2.00 2.44 .203 x .38 4 1645a 30 5,000 c.t. 128 ma. 4-8-16-70 v 2.50 3.75 3.06 2.00 2.69 .203 x .38 4.5 1650g 35 6,600 c.t. 200 ma. 3.5/8/16/250/500 3.13 3.75 3.81 2.50 2.25 .203 x .38 5 1650ha 40 6,600 c.t. 200 ma. 4-8-16 3.13 4.00 3.81 2.50 2.69 .203 x .38 6.5 1650KA 50 3,400 c.t. 318 ma. 4-8-16 3.13 4.00 3.81 2.50 2.69 .203 x .38 7 1650na 60 4,300 c.t. 318 ma. 4-8-16 3.13 4.25 3.81 2.50 2.94 .203 x .38 8 1650pa 60 6,600 c.t. 200 ma. 4-8-16 3.13 4.25 3.81 2.50 2.94 .203 x .38 8 1650ra 100 5,000 c.t. 318 ma. 4-8-16 3.75 4.25 4.56 3.00 3.06 .203 x .38 12 1650ta 120 1,900 c.t. 403 ma. 4-8-16 3.75 4.50 4.56 3.00 3.31 .203 x .38 14 1650wa 280 1,900 c.t. 806 ma. 4-8-16 4.38 7.50 5.25 3.50 5.88 .203 x .38 28 tu be audio
93 europe basingstoke, uk 01256 812812 australia queenstown, australia 61-8-8240-2244 canada guelph, ontario (519) 822-2960 st. laurent, quebec (514) 343-9010 usa cheektowaga, ny (716) 630-7030 ? www.hammondmfg.com push - pull audiophile - output (1608-1650 "a" series) schematic - 1650g only suggested tube types note: the above examples of possible combinations are to help you narrow down the choices of transformers for your favorite tube types. how you operate the tubes (push-pull, push-pull parallel, ultra-linear, class, b+, bias, operating points, etc.) will change optimum plate to plate load impedance. only a few of the most popular tubes are shown. as more tubes become available we will add them to the list. a tube manual or tube manufacturer's technical data sheets should be consulted frst, before making a decision on a proper output transformer. schematic all parts except 1645a, 1650e & 1650g part number audio watts (rms) primary impedance operation tube types 1608a 10 8,000 c.t. push-pull (2 tubes) 6aq5, 6v6, 6bq5, el84, sv83 1609a 10 10,000 c.t. push-pull (2 tubes) 6aq5, 6v6, 6bq5, el84, sv83 1615a 15 5,000 c.t. push-pull (2 tubes) 2a3, 6a3, 6aq5, 6b4g, 6l6, 6v6 1650e 15 8,000 c.t. push-pull (2 tubes) 6aq5, 6v6, 6bq5, el84, sv83 1620a 20 6,600 c.t. push-pull (2 tubes) 6aq5, 6l6, 6v6 1650fa 25 7,600 c.t. push-pull (2 tubes) 6l6gc, 6v6, 807, 5881, el34 1645a 30 5,000 c.t. push-pull (2 tubes) 6l6gc, 6v6, 807, 5881, el34 1650g 35 6,600 c.t. push-pull (2 tubes) 6l6gc, 807, 5881, el34 1650ha 40 6,600 c.t. push-pull (2 tubes) 6l6gc, 807, 5881, el34 1650KA 50 3,400 c.t. push-pull par. (4 tubes) 6l6gc, 807, 5881, el34, 6146b, 6550b 1650na 60 4,300 c.t. push-pull par. (2 or 4 tubes) 6l6gc, 807, 5881, el34, 6146b, 6550b, kt88 1650pa 60 6,600 c.t. push-pull (2 tubes) 6l6gc, 807, 5881, el34, 6146b, 6550b, kt88 1650ra 100 5,000 c.t. push-pull par. (2 or 4 tubes) 807, 5881, el34, 6146b, 6550b, kt88 1650ta 120 1,900 c.t. push-pull par. (4 or 6 tubes) 6l6gc, 5881, el34, 6550b, kt88 1650wa 280 1,900 c.t. push-pull par. (6 or 8 tubes) 6l6gc, 5881, el34, 6550b, kt88 br n (p la te ) bl u/ ye l (s cr e en gr ) br n/ ye l (s cr e en gr ) bl u (p la te ) bl k (0 ohm ) gr n (4 oh m) ye l (8 ohm ) wh it e (1 6 oh m) pr i sec re d b+ schematic - 1650e only br n (p la te ) bl u/ ye l (s cr e en gr ) br n/ ye l (s cr e en gr ) bl u (p la te ) bl a ck (0 ohm ) gr n (4 oh m) wh it e (1 6 oh m) or g ( 70 v) pr i sec re d b+ ye l (8 ohm ) schematic 1645a only br n (p la te ) bl u/ ye l (s cr e en gr ) br n/ ye l (s cr e en gr ) bl u (p la te ) bl k (0 ohm ) bl k/ r ed (4 oh m) bl k/ gr n (8 ohm ) gr een ( 16 oh m) pr i sec re d b+ br n (p la te ) bl u (p la te ) bl a ck (0 ohm ) or g (3 .5 ohm ) ye l ( 16 oh m) r ed/ ye l ( 500 oh m) pr i sec re d b+ bl k/ ye l ( 250 oh m) gr n (8 oh m) tu be audio
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