Aquaboy help: passing no signal, no delay

[Tuxedo3]

Hey guys, I'm in serious need of some help with my aquaboy build. I began the calibration process (by probing the MN3005 to set the bias trim) and got a completely dead signal. No hum from my pickups or anything. I tried just about everything I can imagine. I've included a photo of my board and all my voltages for every IC to prove I'm not crazy. Does anyone have insight into this? I'll gladly answer questions about the build.

[alanp]

You need signal in/out wires soldered to the bottom pads. Don't know which, though, those confuse the hell out of me.

[Ralfg]

Yeah I agree with Alanp. You could test directly from the I and O pads. The jacks pass through to the switch, so you won't get signal passing through from just the jack inputs. Hope that makes sense.

[Adam_DIY]

I had the same issue recently you need to hookup your input from your test rig to S and output to R.

[Tuxedo3]

Awesome info guys thank you. I'm getting delay passing now, but I have different issues.
When I plug it in and turn it on the delay sounds great and works for about 5-6 minutes, then it eventually just stops passing delay and it just clean guitar. It will go between signal with and without delay every few minutes or so. I also get a high pitched whine when I disengage the pedal, which, first off I thought only happened when it was engaged. Second, I thought I took care of when I adjusted the "Clock" trimpot.

[Tuxedo3]

Here's where I think the problem is stemming from. While following the calibration directions I set the "clock" trim to 6.5khz, and the "cancel" and "bias" trims to 12 o'clock. Then I'm supposed to audio probe pin 3 of IC3 and adjust the bias trim until I get delay passing, but if i'm probing that pin I never get delay passing, it's always silent. The only time I get signal and delay through the probe is when I probe the actual output itself. Considering this is my first time audio probing I could be doing it incorrectly, does anyone have some insight into what I could be doing wrong? I'll attach a photo of the build.

[Tuxedo3]

Here's the photo

[Ralfg]

Unfortunately I'm not going to any help here. Not sure why your delay stops working. I did want to say I am having the same problem with the high pitches whine in bypass. At first I thought it was because of the road rage with the charge pump that I am using to run it at 15 volts. I had the road rage attached to the switch with some double sided tape and thought the charge pump might be interfering. But I tried removing it and putting it up against the enclosure, I still get the whine in bypass. You helped me verify that it is not the charge pump.

I havent had any time to really debug as I just noticed it too. I'm wondering if it could be a bad cap or something in the power filter? If you figure something out please update this thread. The bypass whine is pretty bad you you run a gain pedal infront of it. I'd love to get this fixed as it is a pretty sweet delay.

[Boba7]

Did you try a buffered pedal in front of it? I remember mine had some noise issue, cant remember if it was the delay or the lfo (I had the mod board connected) but a simple klon buffer at the input got rid of it.

[Tuxedo3]

Did you try a buffered pedal in front of it? I remember mine had some noise issue, cant remember if it was the delay or the lfo (I had the mod board connected) but a simple klon buffer at the input got rid of it.

That's a good idea, I did try my buffer before it. The weirdest part about this is that the whine goes away when the drive I had before it on my board is engaged... so that's some witchcraft.