I’m officially calling my single ended plexi project, the SEplex, done.
I’m really happy with the way it came out and it has a great EL34 tone. The problem, for my situation, is it’s pretty loud especially compared the the 6F4P amps I have been working on recently. This would probably be able to keep up with most drummers. I think the extra gain stage to replicate the gain of the phase inverter in a real plexi makes a huge difference transferring this preamp from push pull to single ended. It also makes adding NFB and a presence control easy which I think is needed for an actual plexi type sound.
I’ll do a longer write up at some point but in the mean time here is the schematic:
And a couple pics:
