Ampeg B15S power tube substitution

[mresistor]

I have an Ampeg B15S here and the 7027A's are shot.  Is it OK to use Sovtek 6L6GC in this amp?

[davidwpack]

I'd have to wire my Ampeg differently. Pins 1 and 4 are connected internally I think in a 7027.

[PRR]

Check the actual factory wiring VERY carefully. The 7027 has some odd pins different than other octal pentodes. As said their is second G2 pin; there may be others.

[mresistor]

thanks..  I ordered 7027A tubes for it .. but found out the OT is bad..   

[davidwpack]

That sucks about the OT. I thought about wiring mine for 6L6 but I really like the sound of the 7027A's. I have 2 though so maybe I'll rewire one...or maybe 6550?... I don't know.

[sluckey]

I thought about wiring mine for 6L6 but I really like the sound of the 7027A's. I have 2 though so maybe I'll rewire one...or maybe 6550?... I don't know.

If it's wired as the schematic shows then you won't have to change any wiring. But you gotta verify that.

[davidwpack]

It seems like it wasn't but it's been a while since I've pulled the chassis out. I'd have to look again. I remember something seemed weird with it.