Tube Amp Archive

Never trust the new guy! You guys assumed I was not an idiot! Fishy was on to me. The tone controls were operating, but they were not linear and had peaks and valleys and the 50pf treble cap just killed the treble control. I went over the tone stack and sure enough, I had the bass control hooked up ...

OK, I've been studying. You all probably know this, but here goes. This is basically a Blackface tone stack (not my favorite to start) followed by a tuned "universal gain stage" as layed out in the "Trainwreck Pages". This gives me a basis for modifying the gain stage. First I'm going to bypass it c...

Well, I tried the 33K and it is still not what I'm looking for. I got out the Telly and I'm not having trouble getting clean tones with the guitar volume backed down, but when cranked, it is still real harsh and the tone controls don't seem to be able to defeat it. I'll try adding a resistor to the ...

I tried it with the 50pF treble cap, but it seemed to render the treble control nearly useless. The 150pF gave me more control The speaker cab is a closed back Marshall 4x12 with V-30s and basketweave cloth, so it is a pretty dark sounding cab. Preamp tubes are a good RCA, a Sovtek WB, and a NOS Phi...

This is a Liverpool build using the Mark Abbott schematic and the Ceriatone LiverPull layout. I used what I had laying around, so it is not an official clone, but a re-creation of the circuit. The chassis is a steel Tweed Hi-Power Twin. The transformers are a Vox AC30 set. I used the AC30 choke in p...

I just put a MM low power Twin OT in a '56 Twin. It has end bells, but they are black with no silk screened MM logo. The sticker on the top identifies it as a Mercury Magnetics Axiom FTLPT-O. So, they don't all have logos on the end bells. Maybe the "modern" trannys have the logo'd end bells and the...