Tube Amp Archive

Yep I have the 150k grounded. It's a weird layout due to the preamp tubes being on the same side as the pots, but the circuit is exact (I hope). I basically flipped the ceriatone layout and ran the wires that would normally be at the front edge of the eyelet board to the middle, so that they would b...

Ok here goes. With 123V from the wall, I'm reading B+1 408V B+2 396V B+3 312V B+4 293V B+5 278V and I'm biased at -30V. I did not take any liberties at all with the A1a schematic except for the ppimv rich mod, which I removed and noticed no difference. I do have the standard 100k and 82k for the PI ...

Anybody? :cry: I tried messing with all sorts of values for the tail resistor...using a pot to go all the way from 10k to 50k...it didn't really help that much at all though. It's hard to record what is occurring though in detail. The closest thing that I can think of that it feels/sounds like to me...

Sure thing. Here's some pics. Mind you this thing sounds amazing with the 12AU7, but I'd like to have it work properly as stock with a 12AX7. Again with the ppimv rich mod, it sounded exactly the same way without the mod and additionally, I read that the master volume is out of the circuit when it's...

The problem was definitely still there stock. I added the ppimv rich mod later.

I just finished a wreck based off of the A1A schematic and used Paul Ruby's TW Iron from Toneslut...or Moose? I built it into Weber's ModRod Chassis, which is pretty small, but everything fit...just barely. The only mod that I installed was the ppimv rich mod that I found here on the forums. Anyways...

Long time reader, first time poster here...anyways I've had some pretty good success with Weber's DC30 kit and Deluxe Reverb kit, as well as the Dumble "clone" but I was thinking about building an Express or Liverpool into a Mod Rod. https://taweber.powweb.com/store/kits_weber.htm#ModRod for those w...