ProAnalog Dual Drive Mk1

[TWSpedals]

Traced from a 2004 unit.

Clearly based on a tube screamer with some interesting addtions/changes. With my set up the Phat switch doesn't do much.

There is no pull down resistors. The Bias rail isn't at half the supply. The last half of the 2nd op-amp is not used.

I can't add the schematic so here is a link to my reddit post with it attached. https://www.reddit.com/r/diypedals/comm ... drive_mk1/

[karul]

Sure you can upload images. Here it is.

[TWSpedals]

Honestly I tried over and over on different sized jpegs and upload sources but it kept saying it was too large. Anyway, thank you for adding it here.

[karul]

Honestly I tried over and over on different sized jpegs and upload sources but it kept saying it was too large. Anyway, thank you for adding it here.

I don't know the exact max file size and resolution limit for images on this forum, but when I get a message that it's too big, I use some compression. Lately I use webp format for smallest possible file size.

[Jarno]

Seems like a waste of nice germanium transistors, but maybe one can use components from the "scratch-n-dent" bin (so low HFE, more leakage than preferable etc.)

[TWSpedals]

Seems like a waste of nice germanium transistors, but maybe one can use components from the "scratch-n-dent" bin (so low HFE, more leakage than preferable etc.)

Assuming my schematic is accurate (I believe it is) I agree the germanium transistors as diodes is a shame. A lot could be DC coupled as the 1uf capacitors seem a little redundant. The whole half of a 4558 not being used when there's a transistor used as an output buffer is another interesting choice.

[TWSpedals]

Actually it's pretty much an exact come of an Ibanez Super Tube with a few mods.