Rerurn to Romy the Cat's Site
In the Forum: Melquiades Amplifier
In the Thread: To drive the 6C33C...
Post Subject: DCPosted by Paul S on: 11/10/2010
fiogf49gjkf0d
N-set, I understand you do not mean to hijack the thread with the Axiom, so I actually tried to make generic and/or thread-related observations. I don't know the 6E5P, but generic issues with specific DC tank circuits and driver and output tube stability therein remain. The Axiom appears to address and capitalize on specific/generic issues in very specific ways, and - not to presume - it is perhaps not a great candidate for a generic, mix-n-match approach. YMMV, etc.
As you obviously know, EL34 can be used in triode, and it has been my indirect understanding that its electrical parameters hold, as far as triode configuration makes use of them. I would not use the EL34 if I wanted specific sounds from the output tube, itself, but I do "recommend" it as a potentially "neutral" output tube with electrical advantages that can be electrically relied upon, if that is of use to you. "Sounds poorly" might describe the "sound of the EL-34" where it is made to have a "sound", or perhaps, even, its situational lack of a sound reveals undesirable else. In any case, I believe it can be "neutralized" by sticking to - or at least starting with and tweaking from - its optimum operating points, as listed in the manufacturer's tube manual. And, like I said in the early going, I would sooner stack tubes than stress them. Who knows, you might even re-think the going-in bias against pentode operation in this particular PP application, at least for output.
It might be worth getting ahold of an old RM-9 (or similar output tube mule), to play with, to get a sonic/electrical "feel" for the EL-34 with your driver of choice. I must say, however, that the 6C33C should also do "fine", given the proper use in the right circuit and a large enough supply of them. Like I said, I don't know about the 6C33C in a DC tank circuit...
Best regards,
Paul SRerurn to Romy the Cat's Site