LarMar PPIMV question

[Helmholtz]

For most natural amp distortion I would definitely consider a good ("reactive") power attenuator.

Over here I could buy one from a large online shop, try it out for up to 30 days (2 weaks minimum) and return it for money-back if I don't like it.

Or build one yourself.

[Greg_L]

For most natural amp distortion I would definitely consider a good ("reactive") power attenuator.

Over here I could buy one from a large online shop, try it out for up to 30 days (2 weaks minimum) and return it for money-back if I don't like it.

Or build one yourself.

I've got a Weber Mass 200. It's resistive and reactive as far as I know. It's got an actual speaker coil in it, just no cone.

I use it at home but I don't take it out for practice or gigs. I'd rather the PPIMV for that.

[drewl]

I actually have that type installed right now. It works but it seems all of it's adjustment is in a very narrow range.

I find crossline master volumes like this work better in amps with no neg feedback, like Trainwreck or Vox.

Marshalls sound better with the LarMar

I built a couple amps that can foot switch between two mv's, dual master volumes

[Greg_L]

Well I'm gonna try the LarMar with my 750k dual pot and 200k safety resistors and hope for the best, I guess.

I need to change the bias caps anyway....they're original from 1973.

[Greg_L]

Well, I done did it.



I took out the unnecessary polarity switch on the front panel and put the PPIMV there. It's kind of a long wire run but I twisted the bujeezus out of the wires for au-naturale noise cancellation. I do have two-conductor shielded wire but I had all this color-correct scrap wire laying around so I thought what the hell? It seems to work great. The bias is steady as a rock and the taper is smooth and even. I scoped it and played it and it seems good to me. I think this is much better than the Trainwreck Type 3 crossline MV for this particular amp.