Tube Amp Archive

Just ran into a similar problem with a Matchless 3015. The problem turned out to be a faulty socket. The center of the socket was too large in diameter. It allowed the recto tube to be inserted in any orientation. A new socket solved the problem. Here's a pic of the defective socket with the tube im...

I recently built a 5e3 which had an ever-present hum. Turned out to be one of the shorting jacks not doing its job.

Will do. I'll let you know what I find. Thanks for your input!

That would be the 12v Zener. Yes, I did power up the amp.