BLACKFACE BANDMASTER HEAD DRIVERS

What happens is, the internal components warp, and touch each other, or the tube leaks air because the glass cracks. I've had 6L6's go bad.they don't glow purple anymore, and get redhot. There was a thread that suggested you could have a circuitry problem in you amp.

I haven't checked in recent years, but the last time I bought tubes for a guitar amp, the 12xx7's were at least 10 bucks EACH, and the power tubes(large ones) were about $70 for a matched pair. You can fine tune your amp by using different tubes(the options are 12at7 and 12ay7), but this can be expensive. But usually, I've found that 12ax7's work well in all positions.

BLACKFACE BANDMASTER HEAD DRIVERS

The small tubes are for the tone controls, and drivers for the power, and spring reverb, sections of the amp. Pick the one that best fits your style of music(there should be a guide on the GrooveTubes website). Or, as another choice, you can use Groove Tubes. They're less expensive, and are well-matched. I personally prefer the tubes from Mesa Boogie. It's best to replace these large tubes as a set/pair. There is usually 2(you don't have a 90w or 100w version, do ya?). The large tubes in a Bandmaster are 6L6(GC).

You didn't mention if it has reverb.but no matter, except reverb requires an extra small(12at7 or 12ax7 or 12ay7). Tubes are way expensive these days.įirst, you can really make your amp sound great with a whole set of new tubes. Slowhand, this is a simple fix.but get out your wallet, it'll cost some bucks.

Blackface bandmaster head