The Amplimo 65PP20KG Output Transformer Push-Pull Push-Pull 65 Watt | 20 kΩ is a wide bandwidth toroidal tube output transformer with 65 W nominal power, 20 kΩ primary impedance, and 4, 8, and 16 ohm secondary taps.
Amplimo 65PP20KG Wide bandwidth toroidal tube output transformer, push-pull, 65 W, 20 kΩ
The Amplimo 65PP20KG is designed as a toroidal tube output transformer for push-pull amplifier circuits. With a 20 kΩ primary impedance and 65 W nominal power handling, it is a specialised choice for high-quality audio components where wide bandwidth and robust construction are required.
On the secondary side, the transformer provides 0, 4, 8, and 16 ohm connections, making it suitable for matching common loudspeaker impedances in tube amplifiers. The winding ratios are 70.3 for 4 ohm, 50.0 for 8 ohm, and 35.6 for 16 ohm. Only one secondary tap should be used at a time.
Performance specifications include a -3 dB frequency bandwidth from 7 Hz to 22 kHz at 1 mW, with power bandwidth starting at 35 Hz. The transformer has a primary inductance of 1400 H, primary leakage inductance of 13 mH, and primary capacitance of 410 pF, supporting stable operation across a broad audio range.
The 65PP20KG has a toroidal form factor with dimensions of 140 mm outer diameter by 62 mm height and a weight of 4.2 kg. It is intended for toroidal clamp and washer mounting, providing a secure installation method for amplifier builds and service projects.
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