Push-Pull Output - General Purpose (125A-E Series) Tube Audio 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. 125A 125B 125C 125D 125E Audio Max D.C. Bias Watts (ma) 3 5 8 10 15 25 45 60 70 80 Dimensions (Inches) Primary Inductance Henrys A B C D 14.94 8.97 5.60 4.48 2.99 2.06 2.38 2.81 3.25 3.69 1.25 1.38 1.50 1.75 2.00 1.19 1.38 1.69 2.00 2.31 1.75 2.00 2.38 2.81 3.13 G Mtg. Hole 0.187 0.187 0.187 0.187 0.187 Wt. Lbs. 0.19 0.3 0.5 1 1.5 Schematic & Hook Up Data Connect Speaker to (Sec. Lugs) 6 Blue (Plate) 5 Red (B+) 4 2 3.2 8 12 15 27K - - - - 2&3 18K 3&4 16.5K 24K - - - 22K - - - 4&5 10K 13.5K 21.6K 27K - 5&6 8.5K 11K 18K 22K - - - - - - - - - - - - - - - - 5.4K 7.2K 11.5K 15K 21.6K - - 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 1&4 2.15K 2.9K 4.6K 5.8K 8.7K 11.6K 17.4K 21.5K SEC 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 2 CANADA EUROPE Guelph, Ontario (519) 822-2960 St. Laurent, Quebec (514) 343-9010 www.hammondmfg.com Cheektowaga, NY (716) 630-7030 88 USA 6 1&3 Brown (Plate) © 4 Resulting Total Primary Impedance (Blue Wire to Brown Wire) 2&4 3 PRI 1&2 Voice Coil Impedance (Ohms) 1.5 Basingstoke, UK 01256 812812 AUSTRALIA Queenstown, Australia 61-8-8240-2244 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. Audio Watts 125H 125J 8 8 Primary Secondary Primary Impedance Impedance Inductance (Ohms) (Ohms) Henrys 10K 2.5K or 4K 2, 4 or 8 6/8 or 3.2/4 5.6 5.6 Dimensions (Inches) A B C D 2.81 3.25 1.40 1.50 1.63 1.94 2.38 2.81 G Mtg. Hole 0.187 0.187 Wt. Lbs. Tube Audio Part No. 0.55 1 Schematic & Hook Up Data Green Lug #4 8 Ohms Blu (Plate) Blu (Plate) Yellow Lug#3 4 Ohms Red B+ Red B+ White Lug #2 2 Ohms Brn (Plate) Brn (Plate) Black Lug #1 Common PRI PRI SEC SEC 125J 125H Pri. Impedance Sec. Use Sec. Plate to Plate Impedance Lead Brown to Blue (Ohms) Connections (Ohms) 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 EUROPE Basingstoke, UK 01256 812812 AUSTRALIA Queenstown, Australia 61-8-8240-2244 CANADA www.hammondmfg.com Guelph, Ontario (519) 822-2960 St. Laurent, Quebec (514) 343-9010 89 Cheektowaga, NY (716) 630-7030 USA ©