88 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 output - general purpose (125a-e series) universal push-pull "classic" tube output transformers designed for general purpose or replacement use in push-pull tube output circuits. ? for single ended use, see our 125 se series - optimized for single ended tube output circuits. ? frequency response: 150 hz. - 15 khz (+/- 1db max. ref. 1 khz) ? open style with minimum 5" long primary leads, secondary solder lugs for convenient secondary connections. ? tables provided with each transformer listing 90 pre-calculated impedance ratios. ? primary impedances from 1,200 to 25,000 ohms and secondary impedances from 1.5 to 15 ohms (see chart below). ? part no. audio watts max d.c. bias (ma) primary inductance henrys dimensions (inches) wt. lbs. a b c d g mtg. hole 125a 3 25 14.94 2.06 1.25 1.19 1.75 0.187 0.19 125b 5 45 8.97 2.38 1.38 1.38 2.00 0.187 0.3 125C 8 60 5.60 2.81 1.50 1.69 2.38 0.187 0.5 125d 10 70 4.48 3.25 1.75 2.00 2.81 0.187 1 125e 15 80 2.99 3.69 2.00 2.31 3.13 0.187 1.5 connect speaker to (sec. lugs) voice coil impedance (ohms) 1.5 2 3.2 4 6 8 12 15 resulting total primary impedance (blue wire to brown wire) 1 & 2 27k - - - - - - - 2 & 3 18k 24k - - - - - - 3 & 4 16.5k 22k - - - - - - 4 & 5 10k 13.5k 21.6k 27k - - - - 5 & 6 8.5k 11k 18k 22k - - - - 1 & 3 5.4k 7.2k 11.5k 15k 21.6k - - - 2 & 4 4.2k 5.6k 9k 11.2k 16.8k 22.5k - - 3 & 5 3.3k 4.4k 7k 8.8k 13.2k 17.6k 26.4k - 4 & 6 2.4k 3.2k 5.1k 6.4k 9.6k 12.8k 19.2k 24k 1 & 4 2.15k 2.9k 4.6k 5.8k 8.7k 11.6k 17.4k 21.5k 2 & 5 1.55k 2.05k 3.3k 4.1k 6.15k 8.2k 12.3k 15.5k 3 & 6 1.3k 1.7k 2.7k 3.4k 5.1k 6.8k 10.2k 12.8k 1 & 5 - 1.4k 2.2k 2.8k 4.2k 5.6k 8.4k 10.2k 2 & 6 - - 1.7k 2.1k 3.15k 4.2k 6.3k 8k 1 & 6 - - 1.2k 1.5k 2.3k 3.0k 4.5k 5.6k schematic & hook up data br ow n (p la te ) re d (b +) bl ue (p la te ) 3 5 6 pr i sec 1 2 4 tu be audio
89 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 output - general purpose (125h-j series) multiple impedance - 8 watt "classic" tube output transformers designed for general purpose or replacement use in push-pull tube output circuits. ? frequency response: 150 hz. - 15 khz (+/- 1db max.- ref. 1 khz). ? 125h - open style with minimum 5" long primary leads, secondary solder lugs for convenient secondary connections. ? 125j - open style with minimum 10" long primary & secondary leads. ? schematic & hook up data 125j 125h part no. audio watts primary impedance (ohms) secondary impedance (ohms) primary inductance henrys dimensions (inches) wt. lbs. a b c d g mtg. hole 125h 8 10k 2, 4 or 8 5.6 2.81 1.40 1.63 2.38 0.187 0.55 125j 8 2.5k or 4k 6/8 or 3.2/4 5.6 3.25 1.50 1.94 2.81 0.187 1 pri. impedance plate to plate brown to blue (ohms) sec. impedance (ohms) use sec. lead connections 4,000 c.t. 6/8 wht - grn 4,000 c.t. 3.2/4 wht - yel 2,500 c.t. 6/8 blk - grn 2,500 c.t. 3.2/4 blk - yel br n (p la te ) bl u (p la te ) lug #1 co mmon lug #2 2 ohm s lug#3 4 ohm s lug #4 8 ohm s pr i sec r ed b+ br n (p la te ) bl u (p la te ) bl ac k wh it e ye llo w gr een pr i sec r ed b+ tu be audio
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