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Re: Cheap source for R3? [message #30414 is a reply to message #30413] Sun, 06 February 2005 05:17 Go to previous messageGo to previous message
PakProtector is currently offline  PakProtector
Messages: 935
Registered: May 2009
Illuminati (2nd Degree)
Hey-Hey!!!,
One of the 10 or 15 turn cermet trim pots from Mouser is what I suggest. They do not need to be very robust, and are perhaps $2 each.

Mike Percey sells a high performance bulk-foil version. I have not tried this yet, but would buy a few when next ordering from him.

For this sort of small signal work, I prefer to stay away from parts with that much stray inductance( wire-wound=inductive coil ). Stray capacitance is also higher with such designs( I suspect, no absolute confirmation, but it does generally follow ).

Stray stuff is begging to contribute to an oscillator circuit. We are trying to avoid creating an oscillator, remember?
regards,
Douglas

 
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