Glory Hole build on Protoboard - Tone and Vol not working

zakco

Member
As per the title, I've built the Glory Hole circuit on PPCB's proto board using it's built in Vref. The circuit passes signal right to the end, but the Tone and Volume pots have no effect. The Drive control works perfectly, so does the Hi Cut switch and the clipping sounds as expected. I've gone through the connections many times, I can't find a mistake and there are no points where a probe doesn't get signal. Vref measures 4.5 volts at every point I've checked including pin 5 of the IC.

I checked the signal at each major section as I built it and everything worked as it should right up to the tone control.

I had assumed that the Protoboards built in Vref and power filtering would mean that I could ignore the Glory Hole's power circuit and start building at the input, which is what I've done. Maybe this isn't the case?

Sorry for the tape labelled resistors - I know it looks ridiculous. I'm trying to memorize the color codes but it's hard and I want to make stuff while I'm learning.

This is my first breadboard project that uses Vref and and an IC, so it's possible that I'm misinterpreting something in the schematic. Any ideas?
 

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