Hi Trev,
Most of my questions are pretty general. Signal injection testing, capacitor value relation to frequency, that sort of stuff.

I posted the photo in another thread. Here is the finished chassis.



I changed my mind and built a S-6424. After changing the value of the cathode bias resistor value, which caused the amp to run at 70%/24 ma, it sounds pretty good.

Now I have to make and cover a cabinet. Also, make some sort of face plate.

The 15" speaker arrived, but I don't like the sound as well as the vintage Pre Rola Celestion Greenback. I have four of these speakers. I am not sure I want to put a five or six-hundred-dollar speaker in this amp.

I think I have one more music project, a rack-mounted tube Tremolo and Reverb. I think the time has come to get my hands out of all this 600-volt stuff.

I may try to build some effects boxes, all low-voltage transistor stuff.

Cheers,

Billy

“Amazing! I’ll be working with Jaco Pastorius, Charlie Parker, Art Tatum, and Buddy Rich, and you’re telling me it’s not that great of a gig?
“Well…” Saint Peter, hesitated, “God’s got this girlfriend who thinks she can sing…”