for other values & custom designs, contact factory. specifications subject to change without notice. 15801 chemical lane, huntington beach, ca 92649-1595 tel: (714) 898-0960 ? fax: (714) 896-0971 rhombus industries inc. 7 couplng3 - 11/98 1 2 4 3 6 5 2 4 6 1 3 5 coil b coil a .200 (5.08) typ .250 (5.72) .525 (13.34) typ. 1.025 (26.04) 1.65 (40.64) 1.20 (30.48) .200" x 8 equal spacing .250" x 2 equal spacing split-bobbin style package electrical specifications at 25 o c parameter T-31107 t-31108 units impedance pri. 600 600 w r load sec. 365 470 w turns ratio 1:1 1:1 direct current in pri. (dci) maximum 80 80 ma dc resistance pri. + 10% 95 95 w sec. + 10% 180 180 w insertion loss max., ref. 1 khz 2.0 2.1 db return loss min., @ 300 hz 15 26 db longitudinal balance min., 200hz to 4khz 60 60 db frequency response 300 hz to 3.5 khz + 0.25 + 0.25 db isolation minimum 1500 1500 v rms schematic style c d 1a 2a 1b 2b 5a 6a 5b 6b schematic "d" schematic "c" 1a 2a pri 3a 4a 1b 2b 3b 4b 5a 6a 5b 6b sec frequency range: 300hz to 3500hz low profile package custom designs available low distortion isolation is 1500v rms min. designed to meet fcc part 68 modem coupling and voiceband transformers
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