The Amp Garage

Could it possibly be a Matsushita tube. They were set up by Mullard and I know that there EL34's look identical to a Mullard except for the guide pin hole. I see RCA branded tubes on Ebay quite frequently being sold as Mullards but are actually Matsushita tubes.

As Roe mentioned, the variac was not necessary for "Larry's" method. I was just being over cautious because this was a new build and I wanted to be sure I had not made any mistakes.

+1 on checking the tube sockets for carbon traces. I had a tube flashover in one of my builds and I tried cleaning the socket several times but I kept blowing new tubes in that particular socket. I finally ended up replacing the socket and the amp has run fine ever since.

Hello, this is also my first post and I thought I would share my experience with the "Larry Method". I recently finished building a JMP 2204 clone and decided to try this method on the set of ARS 50/50 caps that I used. For this 50 watt circuit all I had to do was attatch a 100k 2watt metal film res...