The Amp Garage

Hello again, I just wanted to thank you guys once again for the help with this mystery. Today I found the problem!!! After bypassing the bias scaling circuit, I began to turn the pot to the power MOSFET expecting that I would see some change in my B+, but again I was seeing very little change. Howev...

Hey All, I was out fishing this weekend so I didn't have a chance to thank everyone for their replies. I probably won't get to tinker with the amp today, but I'll definitely be doing some experimentation tomorrow. To Martin: Just to make sure I'm correctly interpreting your edits, I've made a new sc...

Hello All, I know the topic of VVR's has been beaten to death on this forum and others, but I built a prototype 5F6-A style amp this summer and I wanted to add a fixed bias VVR to it. I couldn't find the PCB for sale anywhere, so I found an old instruction manual (music-electronics-forum.com/attachm...