SOLVED Loud pop from Arachnid (it's all gone downhill from there)

[p_wats]

I'm getting a loud pop in an Arachnid build I just boxed up, which is strange, as I've used the relay bypass before and it was absolutely silent---in fact, this exact bypass board/switch was salvaged from a build where it had also been silent.

Here's what I've tried so far:

• Different power supplies (including battery): same pop
• Different amps/cables: same pop
• Jumpered in an extra pull-down resistor on input and output: still pops
• Disconnected the LED: same pop

Curiously, the pop only seems to occur on power off, not power on.

Also, in this build I'm doing the wet/dry output mod (taking the dry out from pin 7 of the TL074) and the dry out doesn't pop.

Any ideas before I take it all apart and try replacing the relay board (I have a few extras on hand)?

 

[BuddytheReow]

Glad to hear this has been fixed

 

[p_wats]

Ok, so I solved the pop, but now I spoke too soon in saying it was all over. Each patch works (both EEPROM and internal), but there's a seasick wobble to everything. Almost like the clock or one of the control knobs is being turned slightly or affected by an LDR.

I thought I had it fixed for a second, but seems to have returned. I'm thinking it may be intermittent connection somewhere in my FV-1 soldering, but open to suggestions.

 

[Nostradoomus]

Like the stock FV1 chorus patch?

 

[p_wats]

Like the stock FV1 chorus patch?

Like every patch works as intended, but there's a warble on all of them.

I thought I had it, as I resoldered the connection to the external clock knob, as that seemed like a likely source of a pitch shift warble, and it went away for a few minutes, but is back again.

Must be an intermittent connection. I'll check them all.

Basically, we're at the point (again) where troubleshooting is causing more damage than the initial problem. Ha.