Lectric FC Dandy Horse help

[jwyles90]

Hey all,

I am humbly coming to you again with issues I'm running into on my second Dandy Horse build (honestly I need to just stop building these things).
Basically it seems to be working in the sense that I'm getting some modulation out of it and the modes are "functioning" enough to know that there isn't any issue there, however I'm unable to dial out any of the high pitched whine that should be dialed out with the cancel trimmer.
The cancel trimmer itself seems to only range from "super intense whine" to "somewhat subtle but still present" whine. It's the most pronounced with the trimmer set in the center, and then gradually decreases the further I turn it left or right. I'm also noticing that the gain 1 and 2 trimmers don't seem to have that pronounced of an effect, unless I max out Gain 2 I don't really hear a difference between them.

I started checking voltages and everything looks good except for the 3007s, so I suspect something is up there. On IC3 my readouts are:

15v
7.5v
10.1 (should be 7.8v)
0
0
7.7-9.5v (should be 7.5v)
8.8-9v (should be 8.4v)
8.9v (should be 8.4)

on IC4 I'm getting:
15v
10-12v (should be 7.5v)
9v (should be 6.6v)
0
0
10 (should be 7.5v)
8.6v (should be 7.6v)
8.3v (should be 7.4v)

I've doubled checked all the resistor and cap values around the chips, reflowed everything in that area, and still can't seem to figure out what the issue is or how to get rid of the whine that's there. Any help would be greatly appreciated!!

 

[beansell]

It's just helpful to know that there are others experiencing similar problems on this build, and that they can get it going. I spent well over 20 hours over the last few months trying to make this thing work. It's a commission too, and there are only so many times I can apologise (and give discounts) to a customer before they get fed up.
I'm not entirely happy with how it's sounding currently - sounds a bit distorted and lacks high end. Got any tips for getting the calibration right with just a multimeter?
@magicman I see you're having similar issues. If I find a good resolution I'll be sure to let you know.

 

[jwyles90]

I'm not entirely happy with how it's sounding currently - sounds a bit distorted and lacks high end. Got any tips for getting the calibration right with just a multimeter?
@magicman I see you're having similar issues. If I find a good resolution I'll be sure to let you know.

I would probably take an audio probe to each component starting from where the signal hits the circuit and see if it sounds clear right at the beginning/where it starts to get more distorted and muddy. Might be worth seeing if there's a specific spot that the audio signal changes in quality?