Hey guys trying to date my clubman head c1862 , and recomend me some el34,ef86,5ar4-tubes for this amp....THANKS!!!
the good news as you may know, is you dont need to bias the amp.
Thanks for the tip. That's good to know as my clubman rig has a LOT of hours on the current pair of EL34s. The good news is both my live rigs are EL34 based amps so I have a half dozen pairs of Svets, EHs and JJs that can be swapped in at a moments notice.
Nice to know I don't have to take the amp anywhere for rebiasing after a power tube change.
The Clubman is cathode biased, or what many folks call "self biased". But this name can be misleading, the tubes will self bias within limits. It's just the nature of cathode bias. But it still is a good idea to check even on cathode biased amps to make sure it is set correctly. Especially with the variances seen between tubes even within the same mfgr.Originally posted by Kiwi
While I'm pleased to be told that I don't need to re-bias my EL34 Clubman, I have to ask ...
Every other EL34 amp out there I've ever heard of needs to be re-biased on a power tube swap ... what is different about the Clubman's design?
I guess I'd feel better if I had one of the amp gurus around here confirm this.
Thank you Mr. Kiwi! Now maybe I can swap in a couple of different matched pairs of EL34s and see what it does to the sound.Originally posted by Kiwi
I just heard back from tech support at Matchless.
The Clubman does not need to be re-biased for different EL34 power tubes, because it is cathode biased.