12/16/24 AudioCollections 132TypeStereoPower&NFTypePreAmplifier [YouTube]https://www.youtube.com/watch?v=ZaJIwaGPxjI
06/13/24 AudioCollections4300BSingleEndedStereoAmplifierOIL HandMadeTransFormer [YouTube] https://youtu.be/oEwh2F17QbQ