I am very interested in this as well.I can't bear to slog through any more of this. A friend has come up with a 2-10" that's never been modded. It needs output tubes and the bias conversion.
Did you guys (and this sub-group) ever come up with a list of simple changes that really help the stock amp? I'd like to get it improved without the major changes most of us have done. For instance I wouldn't want to split V1 or move the Ch 2 tone stack to post distortion.
Also, I told him that almost any 10" speakers he could come up with, would be an improvement. Actual recommendations would be better. Lol. I've never owned a 10"...just 12 and 15's.
[FONT="]Could you put Tung-Sol 5881 tubes in concert with whatever bias adjustment to get lower power or will it blow those tubes up.[/FONT]
It shouldn't make any difference; 5881 and 6L6GC have the same transfer characteristics and curves and so given the same operating conditions (eg biased to the same static plate current), should perform the same, or as close as any tubes of the same type can be expected to perform.HI WERTZ2112,
Yes, you can. That's what SMark has in his amp (check out video's and sound on Page 1 of this thread). A re-bias and you're go to go. The 5881 is a version of the 6L6. It is lower wattage (maybe 46 watts or 23 watts per tube). It breaks up earlier. It was used in the Fender Bassman and the JCM 900 (in early 1990's until EL34's became more readily available) among others.
Fair warning for anyone thinking about adding LDRs. I added one to put the midboost on a footswitch. It browned out the -6.2V supply. Without adjusting the resistor on the zener, it doesn't hold up. You end up pondering a better supply off of the heater supply.I do have some twists Why does the reverb need to be in both channels? Why not just the clean? That opens this amp up to be a BF Fender on the normal channel and something else on the other. You would have to add 2 more LCD's[sic] though. The simpler the circuit the better. More stages ad more complexity
Another option is adding a relay and another whole possibility.