Originally Posted by marshman
Well, in virtually ALL guitar amps, V1 is located furthest from the power tubes. The becomes problematic, as in opposition to typical tube labelling practices, your power tubes are labelled V4 & V5. In terms of signal path, though, V1 is furthest from the power tubes, eg, the first tube with which your guitar signal interacts.
V1 & V2 handle "input duties"
V3 is your Phase inverter
V4 &V5 are your power tubes
V6 & V8 look like the reverb tubes--V6 looks like driver, V8 like recovery
V7 looks like your tremolo tube.
V1 should have a significant impact on your tone, as it's the first one in the path.
V3 & V6 (if I've read it right) would probably both benefit from being swapped with 12AT7s--my opinion only, of course.
Of course, very little of this actually answers the question of 'which tube is which?' You'll need what's generally referred to as a 'layout'. Some amps have had the tube designators stamped in the chassis, but you'd probably have noticed that. Perhaps an online manual?
Does anyone see a Reverb tranny in that schematic anywhere?
Hope this helps.
Thanks, this does help.
I initially replaced what you are saying is V1 with the EH 12AY7 and I didn't hear a huge difference. Then when I put the EH in what is likely the V8 slot, which you are saying is probably the reverb, I heard a major difference and that's where it stays at this moment. I'll have to grab some more preamp tubes and start.
I'm very unknowledgeable about these things so I'm on a steep learning curve at the moment. Thanks for your help.