Homebrew Audio Transformer

Homebrew Toroidal Output Transformer - diyAudio

https://www.diyaudio.com/community/threads/homebrew-toroidal-output-transformer.205219/

Homebrew Toroidal Output Transformer | diyAudio WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. Building, troubleshooting and testing of these amplifiers should only be performed by someone who is thoroughly familiar with the safety precautions around high voltages. Amplifiers Tubes / Valves Homebrew Toroidal Output …

Home Brew Hegehog Audio interstage Transformer. - Canadian ...

https://canadianvintageradio.com/cvrs-forums/topic/home-brew-hegehog-audio-interstage-transformer-2/

The core of the transformer was soft iron wire lengths, as many as would fit,, shellac coated and bent around the winding package. The transformer was inserted into a brass tube that had a copper mounting plate soldered to it. The final turns ratio is 3:5 to 1. Primary resistance is 0.839K ohms and the secondary resistance is 4.70K ohms.

Grommes 260A circuit HomeBrew audio amp - Ohio University

https://people.ohio.edu/postr/bapix/Grom260H.htm

The audio output transformer is a Triad S-152A rated from 7 to 50,000 hertz at 65 watts. Grommes 260A HomeBrew amp The input preamp tube is a 12AU7 in a cascode circuit with a 12BH7 used as cathode-coupled (long tailed) phase inverter.

Making Homebrew IF Transformers - QRZ Forums

https://forums.qrz.com/index.php?threads/making-homebrew-if-transformers.650241/

Mullard-circuit ultralinear HomeBrew audio amp

https://people.ohio.edu/postr/bapix/MullrdHB.htm

The Mullard 5-20 had the larger coupling caps as well as a similar approach to B+ filtering as the homebrew. However, neither the homebrew amp nor the Eico HF-35 use the 1 K ohm series resistors in the Mullard 5-20 screen grid circuitry. Both connect directly to the 43% ultralinear output transformer tap. Early checks and repairs