Posted by EX 450 Owner on November 09, 2011 at 12:03:45 from (50.96.220.145):
In Reply to: O/T electronic Gurus posted by glennster on November 09, 2011 at 11:00:05:
It has been a long time since I looked at a Wien bridge circuit, if memory serves me correctly, the pot would be for a symmetry adjustment of the waveform.
Fixed resistors come in limited values so the purpose of the pot is to be able to tune to a resistance value that you probably wouldn’t be able to find in a standard value fixed resistor.
just tune the circuit put a dot of finger nail polish on the adjustment screw or shaft to the body to lock it tight and forget it.
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