Recent content by tcpoint

I have to second what Justin said. Thanks for the cool demo.

What does your test circuit look like? I seem to recall that you need a load on the output of the regulator to get an accurate reading. I just looked on the datasheet and you need a minimum load of 1ma. The min input voltage is 7 volts.

Try some low gain BD139 for the silicon transistors. They aren't the typical TO92 transistors.

Good to hear that your daughter is doing alright. If you end up in Europe, you can find some rare electronic parts.

Guitar

I built the Guyatone PS-021 Guitar Exciter / Compressor (AionFX Meridian Exciter / Compressor). I have to say that I really like this exciter / compressor. Madbean is coming out with a Boss CS-3 board, this month. My two favorites, right now, are the OTC-201 and the Guyatone. I'm not a big...

I got a bad batch of 7660 and they squealed like crazy.

If you have some TL072s on hand. Try replacing the 4558s. The JFET opamps seem to be more stable. If that works, you can debug the 4558s. You could use your scope and see where the oscillation is occurring.

I always suspect the charge pump ic.

I have a bunch of Russian transistors, as well. I need to inventory them (I should just send them to Fig). If there's certain ones your looking for, I'd be happy to share. I have a DCA75 so I can measure them, as well.

I have a few vtl5c9. Can't remember where I got them but my Wavelord sounds great. Just DM me. I'd use a socket just to be sure.

I don't know about you guys but I always get the last words in with my wife. OK. "Yes, dear" are the last words.

I ordered one of those smd sorting boxes. Makes sorting much easier. I had 45 mmbf5457 that I ordered awhile ago. Got 4 quads. I only plan on keeping two quads so if anybody needs a quad, dm me. I'm sorting some 2sk209-gr by idss. You need two two matched pairs for a Blues Driver.

I built one. It nails the Pearl Jam sound but it isn't a trick pony. It is a good MiB pedal.

Lowering the source resistors (R8 on the first stage and R14 on the second stage) will give you more gain. I'd start with R14 and if that doesn't do it, change R8 (leave R14 unless it gets too fizzy). Socket these resistors.