Tube Driver - Interstage (124 Series) TUBE DRIVER - INTERSTAGE TRANSFORMERS • Designed for general purpose or replacement use in single ended or phase inverter tube driver circuits. • Open style with minimum 5" long primary leads • Minimum frequency response 150 Hz. - 15 Khz (+/- 1 db max. ref. 1 Khz.) at full rated power. • Part number 124B is the same as the 124A except for 49% Nickel laminations for greater fidelity. • Part number 124C is the COIL ONLY (for those experimenters who want to use their own "iron"). Audio Watts 124A 124B 124C 124D 124E 5 5 5 5 5 Primary Impedance (Ohms) 10K 10K 10K 7K C.T. 15K C.T. Secondary D.C. Resistance (Ohms) 403 403 403 454 728 Impedance (Ohms) 90K C.T. 90K C.T. 90K C.T. 15.8K C.T. 33.8K/135K C.T. Dimensions (Inches) D.C. Resistance (Ohms) 1,524 1,500 1,524 681 3,880 Laminations Grain Oriented Steel 49% Nickel None (coil only) Grain Oriented Steel Grain Oriented Steel A B C D 2.38 2.38 2.81 2.88 1.35 1.35 1.46 1.74 1.43 1.43 1.68 2.37 2.00 2.00 2.38 2.38 G Mtg. Hole 0.187 0.187 0.187 0.187 Tube Audio Part No. Schematic & Hook Up Data (124A-D) Red Grn Blk Blu Grn PRI 124A-C SEC Brn Grn Red Blk Blu Grn PRI 124D SEC Schematic & Hook Up Data (124E Only) Grn/Yel Blu Blk/Yel Grn Red Brn PRI SEC Blk • For Parallel connected operation (33.8K Ohm Secondary): Connect the GRN/YEL wire to the GRN wire and the BLK/YEL wire to the BLK wire. • For Series connected operation (135K Ohm Secondary): Connect the BLK/YEL wire to the GRN (this becomes the center tap) GRN/YEL and BLK wires are the output. 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 81 Cheektowaga, NY (716) 630-7030 USA © Tube Driver - Interstage (126 Series) Tube Audio TUBE DRIVER - INTERSTAGE TRANSFORMERS • Designed for driver use ONLY in single ended tube output amplifiers. These units replace coupling capacitor circuits for improved sound. • Closed style with minimum 8" long leads. • All models use bifilar wound windings for exceptional coupling and bandwidth. • Minimum frequency response 20 Hz. - 20 Khz (+/- 1db max. ref. 1 Khz.). • The core is gapped to support the specified D.C. bias current. • Core uses Hi grade silicon laminations (29M6). • Units weight - 3 lbs. 2 oz. Part No. Audio Watts 126A 126B 126C 4 4 4 Primary Secondary D.C. D.C. Inductance Impedance Impedance Resistance Resistance (Ohms) (Ohms) (Ohms) (Ohms) 5K 178 5K 178 59 Henrys 5K 178 5K 178 44 Henrys 10K 375 10K 375 106 Henrys Rated D.C. Bias Current 15 ma. 30 ma. 15 ma. Dimensions (Inches) G Mtg. Slot 2.50 3.12 3.12 2.00 2.25 .203 x .38 2.50 3.12 3.12 2.00 2.25 .203 x .38 2.50 3.12 3.12 2.00 2.25 .203 x .38 A B C D E Schematic & Hook Up Data Brn Grn Blu Blk PRI SEC CANADA © EUROPE Guelph, Ontario (519) 822-2960 St. Laurent, Quebec (514) 343-9010 www.hammondmfg.com Cheektowaga, NY (716) 630-7030 82 USA Basingstoke, UK 01256 812812 AUSTRALIA Queenstown, Australia 61-8-8240-2244