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I just finished my build and I’m not getting the bias readings I should. I measure 4mv regardless of how I set the bias adjustment. I am also not getting any sound, hiss, or any kind of noise out.

I’ve checked connections, looked for shorts, tested continuity, I’m getting 350v from each side of the transformer, but after the first diode on each side the voltage is 146.

Any help or ideas would be greatly appreciated,

Thanks,
Kevin

Could you post some pics of the wiring? Let me see if I am able to help you out.

Since my previous post I was able to get the amp working very well. My overdrive switching is not wired as the Diagram, but it works. My current issue is the tube effects loop, which is very noisy.

You can lower the signal level that is being sent to an effects device's input with some effects loops. getting over it

I also had this problem and then the sound was lost, you can review the device's schematic circuit again
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