midway the hum appears. In 0 or 10 the hum dissapear.
Of course using shielded audio cable will eliminate the hum. From the mic to the pot and from the pot to the amplifier input.
The rows of contacts and wires all over the place in a solderless breadboard pickup hum and all kinds of interference.
I tryed the shielded wire and it didn't work out at all
If even with the addition of the well-sized filter the noise has not disappeared, apparently the interference reaching the amplifier is of the common mode type. This reinforces the belief raised above that (not grounding, but) earthing the shield mesh could somehow improve the noise atenuation. In addition, you could chek if it is possible to add the Capacitor not only close to the Mic, but also another one or even itself as close as possible of (or within) the connector at the end of the cable, although clearly difficult.Then I solder a 0.1uF capacitor and a 1M resistor directly to the plug to see how it affected the signal, in theory the cuttoff freq. would be 15Hz with is SILENCE! aaaand NOTHING HAPPENED
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