GC has output when volume is zero

[azira]

I'm driving the GC from the headphone output of a CD boombox. When I turn the volume all the way down on the GC, I can still hear music playing at a really quiet volume. I can turn up the CD player and hear it a little louder but still pretty quiet. This also happens when I drive it from my mackie mixing boards headphone jack. The GC circuit was built from p2p soldering of 5% components onto the chip. It's wired up on my bench with aligator chips to all the external devices including the PS. Grounding is achieved by clipping all the ground clips togehter on the speakers neg terminal. Is this just a construction problem?
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Danny

[officeboy]

I don't think your 10K pot has enough resistance to really attenuate the signal down enough.

I would try a 50K or 100K

[officeboy]

This shows what I’m talkin about.

[azira]

Thanks officeboy, that's a pretty interesting sim and suggestion, I haven't thought about it that way. It's also interesting considering it is a cheap pot and plus all the wires and etc running around there could easily be 1-ohm to gnd around the pot.

But it's also funny because when I first ask questions saying I used a 100k pot, everyone told me to use a 10k pot...
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Danny

[officeboy]

Well there are a few different schools of thought as far as what values of potentiometer are best to use.

All I can say is that a higher value one should be able attenuate the signal a bit better.

[matjans]

in general, something between 20k-50k seems to work perfectly.

[ble0t]

Agreed....I've found that I need at least a 50k for good volume control in mine.