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Features
- Designed for general purpose or replacement use in push-pull or phase inverter tube driver circuits.
- Should not be used for single ended applications. They have no gap for DC bias current present in SE mode.
- Open style with minimum 5" long primary leads.
- Minimum frequency response 150 Hz. - 15 kHz (+1 /- 3db) @1 kHz.
- Our part number 124B is the same as our 124A except for 49% Nickel laminations for greater fidelity.
- Our part number 124C (below) is the COIL ONLY (for those experimenters who want to use their own "iron").
- If you are looking to replace Radiola III-A audio transformers, check out our universal radiola replacement unit.
Hookup Data
- 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.
- 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.
Part Details
Click Part No, below, for details (e.g., Product drawings, assembly instructions, ship weight)
Units shown: inch. Switch units to: mm
Part No. | Audio | Primary | Secondary | Laminations | Dimensions | Quantity | Price | Buy Now | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Impedance | D.C. | Impedance | D.C. | Winding | |||||||||||
Resistance | Resistance | A | B | C | D | G | |||||||||
Watts | (Ohms) | (Ohms) | (Ohms) | (Ohms) | Mtg Hole | ||||||||||
124A | 5 | 10K | 403 | 90K C.T. | 1524 | C.T. | Grain Oriented Steel | 2.38 | 1.35 | 1.43 | 2.00 | 0.19 | 22 | $52.938 | Buy Now |
124B | 5 | 10K | 403 | 90K C.T. | 1500 | C.T. | 49% Nickel | 2.38 | 1.35 | 1.43 | 2.00 | 0.19 | 34 | $93.420 | Buy Now |
124C | 5 | 10K | 403 | 90K C.T. | 1524 | C.T. | None-Coil Only | - | - | - | - | - | 19 | $40.482 | Buy Now |
124D | 5 | 7K C.T. | 454 | 15.8K C.T. | 681 | C.T. | Grain Oriented Steel | 2.81 | 1.46 | 1.68 | 2.38 | 0.19 | 25 | $74.736 | Buy Now |
124E | 5 | 15K C.T. | 728 | 33.8K/135K | 3880 | Dual | Grain Oriented Steel | 2.88 | 1.74 | 2.37 | 2.38 | 0.19 | 26 | $90.306 | Buy Now |
124F | 5 | 15K C.T. | 900 | 3.75K / 15K | 899.6 | Dual | Grain Oriented Steel | 2.88 | 1.75 | 2.37 | 2.38 | 0.19 | 13 | $94.199 | Buy Now |
Data subject to change without notice.
Tags: audio transformer, tube audio, valve audio, interstage, tube driver, push pull, phase inverter