Have you run an audio probe through the circuit to see if there is a certain place where the signal is falling off? Pin 1 and Pin 7 of the TL072 would be the first two places I would check as milestone markers and then start narrowing down potential problem areas from there. I'd also do a...
How are grounding the 13 pin? Are you soldering a jumper from 13 to ground? I actually have a HAARP and a Hydra that I cannot get sound out of the FV-1. I've soldered a handful of FV-1s and other surface mount transistors now and have not had any issues until these two. I've run continuity...
I missed this comment, sorry. I think that is sort of what I did with the electrolytic (see photo above). Since the resistor is still going to ground in the signal chain, I should be able to take that straight out as a jumper I believe. I'd have to see if I have a 1uf tantalum.
So, with the legs lifted, the signal stops at the jumper. I'm guessing that since there is is continuity from both sides of R7 with no component installed that the signal is still going to ground, maybe? Is it possible to cut a trace to prevent this, or is it a matter of making a jumper from...
There is continuity between the out pipe, both sides of the R7 Resistor and the negative side of C6 according to my DMM. tested this with R7 and C6 removed from the board.
ok, this makes sense, but since the negative out should have signal, that leads me to believe that C6 is a problem. This helps me visualize the issue, so thank you!
Yes, That is the case. I'll replace C6 first and see if that makes a difference. The orientation is correct, but it may just be a bad part. R7 was a 100k. I was just working backwards from the out pipe and thought I'd ask before going scorched earth on components as it makes a bit of a mess...