OR120 build issue

[orangekick]

Well, now it works. That was dumb. The only thing is that the tubes started to redplate.

[soundguruman]

So it was the bias?
Just too little? The output tubes were overheating...

So now increase the bias...till the red goes away...

[orangekick]

The bias was too little and I had forgotten a simple connection from the grid stoppers, connection "B" on the above layout. It sounds good now. I just need to get it to our rehearsal space to put it through some higher volume applications.

Thanks!

[orangekick]

Here's a clip of the amp completed. I'm taking it to our rehearsal space to crank it up tonight. Thanks for any assistance.

https://www.youtube.com/watch?v=apBo8UsiGjA

[g1]

I hope you got the bias set much closer to the -37V than the -25V that you had. Biased that hot (-25V at pin5) will eat your output tubes pretty quick.

[orangekick]

I did. Thanks.