I've tried it with a few different speakers. PMR 8" hemp super heavy thing, 8" Alnico Jensen, 12" PMR Rockness monster, 10" Tone Tubby Humboldt. I had a MOJO tone nos 5w OT. But i'm moving to a 8W SE one. 500 Ohm Cathode resistor for 6v6. I have a 330-0-330 70ma. It had a SS rectifier I'm in the process of moving it to a new cabinet and chassis, and wanted to see if there was anything I can do to make it get that Layla sound.
Someone will be along shortly to contend that a tube rectifier won't matter in a Champ, (because single ended amps don't sag?).The SS rectifier is a big part of the problem, if not all of it. Stick a 5y3 in there, be sure you have a bypass cap on V1, and a 12ax7 in the slot. If that doesn't do it, I'd suggest a circuit issue.
Someone will be along shortly to contend that a tube rectifier won't matter in a Champ, (because single ended amps don't sag?).
I don't know enough to offer an argument, but I'm here for it .
Sag may not change. But voltage can. SS will run higher voltage, which would have to be compensated down stream in the circuit. I don't know enough to say. But I think 330-0-330v is pretty standard for a tube rectified champ or princeton. That would yield pretty high plate voltages with SS rec in an unmodded circuit.
OP, what's the bias/dissipation at 500ohms? If the 6V6 is well over 100% dissipation, it's gonna break up a lot less.
I got Jack Dar's book around here somewhere...
Someone will be along shortly to contend that a tube rectifier won't matter in a Champ, (because single ended amps don't sag?).
I don't know enough to offer an argument, but I'm here for it .
Well, I think the 5y3 would lower the voltage quite a bit compared to the SS. That's what I think the point he was trying to make. Part of the reason I did was that the Transformer had a broken 5v tap. (only one side worked.) Then I figured, I'd try the Heyboer Transformer from Weber....but I fear it's going to be too high of a voltage. I bought the one for the champ, but it wasn't specific on it's specs....I should have been more critical. I started poking around and think it might even be higher.....uggh...
Hmm....I should have ordered that transformer. The video sounds a lot closer to what i'm going for.Hammond 290AX with the 275v secondary will hit dead on 340v B+ with a JJ 5y3, per the vintage 5y3 layout diagram.
I'll trade ya!Hmm. Clean headroom is something my 57 Champ does NOT have. It starts breaking up around 3.5-4 and goes from pretty gnarly to flat out nasty between 7 and 12.