Messages

Problems with the plumes - Very high input impedance (I suspect this might be a big cause of issues), no RF filtering, extremely high gain (vero seems like it's asking for trouble here), no r/c power filtering and given the active EQ on top of all that gain, I think I'd have split it in to two duals.

I don't think a buffer is the solution, I think tidying up the circuit is.

This one looks pretty good for circuit debugging/tracing:
https://www.amazon.com/Crenova-Auto-Ranging-Multimeter-Measuring-Backlight/dp/B00KXX2OYY/ref=sr_1_7?dchild=1&keywords=multimeter&qid=1600346672&sr=8-7

I love the auto-translate for 'Wont work' on that listing "【9V Battery】DON'T forget to install the 9V battery before using the digital multimeter, or it will go on strike."

Sounds like the ParasitStudio thing... I can't remember the name though, no.

I dig it...

Thanks guys! 

Don't be jealous Jimmy, build it!  You've got to have room for one more phaser.

I'll get a demo after I build the Tappy, I'm super excited to hear Tappy weirdness.

He probably already has and he's just reached the point where there's no more phasers to build so he just doesn't want anyone else to have phasers

So should I throw out all my tayda electro caps ? Never had an issue for my other builds until this one....

See, there's the problem with Tayda, 99% of the time, the parts are fine, but that 1% means having to and being able to track down what didn't work.

But honestly, seeing as you replaced all the caps around the compander, I'm a little stumped as to what's going on... It would be logical to expect voltage variation elsewhere in the circuit if it was an electro elsewhere.

I do wonder if taking IC1 & IC6 out of the socket and keeping the test going might help, you've switched the compander but if one of those had an intermittent problem (odd as that would be), it could potentially cause a problem downstream...

Definitely a tricky problem that either I'm missing an obvious answer to or is just uniquely strange.

Got an abundance of beefsteak tomatoes this year, any suggestions besides slicing 'em for burgers, stuffing them with couscous or tomato salads?

Sorry to hear you're still having trouble! Well it definitely sounds like a cap problem with its cyclic nature... C4 & 6 would be possible suspects to try replacing too, I highly doubt it's related to any film or ceramic caps.

I think I spot some Chang brand caps so am I to assume some of the parts might be from Tayda?

6.8V is just fine Congrats on getting it going again.

What happens to pin 7's voltage if you remove IC1 from the socket? And the same for IC6.

Sorry, I should have read more thoroughly, I was talking about pin 7 of the 571, the voltage shouldn't be that low and that needs taking care of before you worry about output at pin 10.

Well you've definitely pin pointed it to the correct area and you've checked it's not the chip so I suppose my only suggestions are to re-flow the solder joints around there and double check the values of R5 & 6.

Voltages por favor.

Very slick build

I have always wanted this pedal and now it's time to relive my teenage years playing radio friendly unit shifter.

Is this pretty much the reason everyone builds this? Would it be a good idea to release a stripped down stand-alone? Could ditch halve the circuit if just trippy chorus is the goal.

If you ever need a tantalum capacitor for a power related purpose, do not purchase it from them is the only advice I can give.

It is indeed! But even if you want to do it to your board, look at how they do the mix control, that's how you'd get a 100% wet/dry control on a small clone.