I always wonder why someone who struggles with English don't put up where they are from, or what language they speak or understand. There is such a diverse group of people  on the forum there might be someone who could explain it in whatever language they prefer.
I can speak some Swedish, Norwegian and fluent in English, I personally don't care if someone replies in another language. I don't think there is a rule everything has to be in English, but an English translation as well would be nice if it solves the problem. Just my opinion, music is universal.

Quote from: Tassieviking on June 08, 2022, 11:17:00 PMI always wonder why someone who struggles with English don't put up where they are from, or what language they speak or understand. There is such a diverse group of people  on the forum there might be someone who could explain it in whatever language they prefer.
I can speak some Swedish, Norwegian and fluent in English, I personally don't care if someone replies in another language. I don't think there is a rule everything has to be in English, but an English translation as well would be nice if it solves the problem. Just my opinion, music is universal.

Thank you for your opinion that music is universal! I'm from Russia and I speak Russian! I am 60 years old. And I'm waiting for help and an answer to my question. With respect to the world community!

Hi all, I finally made myself open this thing and did those easy mods that everyone should do. Resistors R4 and R5 changed to 100K. Tames a lot off noise.

Hi Guys
Sorry - i don't hang out on this forum very much as i must confess, i am a tube amp fanatic ;-)
The blue dots are where i removed the link wire and the green wire connects to the chassis ground.
One of life's great mysteries is why the only place i could find the schematic for a tube amplifier was on this - a solid state amplifier forum !
Anyway, sorry for the extremely late reply to this thread - i can always be found lurking on the freestompboxes.org forum or you can always email me (while i am still living) baja002steve@gmail.com
cheers to all
bajaman

I recently purchased a TSA30H head for a small price. According to the seller the volume goes way down after a little while. After reading rave reviews on this amp and figuring the problem sounds like just some bad tubes I went ahead with the deal.
Then looking for a schematic I stumbled on this thread and started thinking that my small price wasn't small enough.
Anyway, plugged it in today, hooked to a V30 cab, and I'm quite happy with the sound. Yes, there's a slight hum on ridiculous volume, but not more than on many an old Fender. After a few minutes I got the opposite of what I was expecting. The volume shot way up giving me a slight heart attack and some angry looks from the missus. Played for another 10 minutes or so without further issues. Put the guitar down and left the amp to warm up for half an hour. Sure enough, after that the volume was extremely low.
So I pulled the tubes for visual inspection and much to my surprise it had one 6L6 and one EL34 inside. Now I understand that you should not put EL34's in an amp set up for 6L6, but could that be the whole reason for the soft-loud-soft sequence?
I'm trying to get my head around it, but I just don't understand tube behavior well enough.
I also understand that asking this on a solid state forum is sort of blasphemous, but this seems to be the only thread on this amp in the whole world wide web.
One way or the other, I ordered a pair of 6L6's for proof and pudding but that will take a few days.
I was also wondering if using an EL34 can do damage to the rest of the circuit and if so, what I should be looking for?

There are amps out there like Mesa boogie simulclass where they have a pair of each EL34's & 6l6's. But these are pairs of tubes and the amp is designed to allow this arrangement. No amp that I know of uses one of each different tube as a pair. It just doesn't work in a balanced way. People spend all day trying to create a matched pair of tubes for their amp circuits. EL34 tubes require a power transformer that can handle the current demand which is more than a 6L6 demands on a circuit.