Feedback loop trouble

MIDIbox SID
1

Hello!

I attempted to make a feedback loop plug for my Sammich, where the output is split between a female jack and a male TRS connector.

The image corresponds to the wiring, where the square oscillator (output of Sammich) is wired in parallel to the female output connector and pin 3 of a potentiometer.
Pin 1 of the pot is set to ground and the washer pin is wired to the male TRS connector that goes to the Input of the Sammich.
The wiring shows a mono connection but I’ve made it with a stereo pot so leftOut->leftIn and rightOut->rightIn and the 10k resistor just symbolises the input of the Sammich (no 10k on actual wiring, only for simulation purposes).

 

However, I cannot hear any difference with the pot turned each way, not even when activating the filter in on the patch loaded. 
What am I doing wrong?

Cheers
/Macke

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2

I am not quite sure what you have done, I don’t get the illustration, but here is the info

http://www.bigmech.com/misc/c64mods/feedbackloop.html

 

like here, I use a 500K, 

3

Yeah, i’ve seen it. I don’t understand why he’s chosen to wire pin 2 & 3 together like that.

I’ve used a 200k pot, doesn’t seem like the value of the pot should matter very much since it’s just voltage division.
What is it that you don’t understand?