Recent content by jubal81

Spotted something else on the 1176 schematic that could help a lot. To make the compressor JFET happy, we buffer and feedback half the drain signal to the source and the gate. There's another trick in the 1176 that helps tamp down distortion a lot. It's another feedback path (negative this...

That JFET buffering the source of the first one is still bugging me, especially how the buffer signal goes straight into that big cap to ground. I looked at the 1176 schematic and it feeds back half the drain signal to both the gate and the source, but there's a 10K resistor on the compressor...

I was looking at the Median schematic and I see a few changes that would make it perform a lot better and be easier to bias. Bonus: It would only take a couple more resistors and caps. There's no reason you'd need matched JFETs or have to select ones with the VP and IDSS Wampler used. The 5457...

Limit the current from the opamp through the diodes. Start with 1K - 10K and see how you like it. Also, the feedback resistor in the opamp loop should be at least 10X higher, considering the value of the gain pot.

Goodgoogamooga this is outrageous! I'm glad you pointed this out to me. Pure art. I mean, even polystyrene? Damnation.

Beautiful!! Really nice work and a great result for a first go at it! I'm working on a Mojotone Princeton and waiting for the custom cabinet. Hopefully not much longer. There were some mistakes in the Mojotone documentation and I wasn't thrilled with the quality of the small parts. Next time...

It's a long shot, but the cathode wire and output wire are touching, which could mean a bit of capacitive coupling.

A compact function generator would be pretty handy.

https://www.mouser.com/c/connectors/ffc-fpc/ffc-fpc-connectors/?number%20of%20positions=6%20Position&pitch=2.54%20mm

What's perfect for back lighting is a reverse-engrave material, where there's a clear layer on top and a masking layer on the back that can be engraved. I've done that, too, and it's pretty awesome.

It's a dual layer plastic meant for laser engraving signs. The indicator is a frosted acrylic that can be laser cut. Thanks for the kind words! It took a lot of time and work to get it all dialed in. Dude. Seriously. Yes. But go ahead and do one that can handle up to 3 channels. I haven't seen...

PPCB chips the brain of the bypass switching. Works great!

I have that FA400 and it's useless. I've pondered just getting a desk fan just to keep the fumes directly out of my face.

I voted A because it makes wiring easier.

I liked this one, but I seem to remember it had a lot of hiss. Always wondered about swapping the OTAs for THAT Corp VCAs but never got around to trying that.