GSM-noise "buzz" issue

Werner Almesberger werner at
Fri Sep 19 21:41:27 CEST 2008

[ Cc'ing the hardware list again. I think you dropped it by accident. ]

Angus Ainslie wrote:
> Can someone suggest a digikey part number so the less hardware oriented
> might try it ?

If you don't mind the "short everything" case, then I think any 2.5mm
audio plug will do fine. The microphone signal is at the tip/center,
while ground is on the outmost ring.

Regular stereo plugs (with only three rings) will short the left
speaker to ground, but that shouldn't be a problem.

Here's what this looks like:

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