Can I swap a Stepped Attenuator for a Potentiomer?


Hi I have a Motif MC-7 Preamp that I am going to hotrod a little bit. I wasnt thinking of it and dont want to but when you turn the volume control fast it makes a painful squeaking, I dont turn it fast but its not a good sign and cleaning did not address it as its in a sealed case (Very nice pot that I cant find)

Also there is some crosstalk between inputs on the selector switches. DACT Makes a unit that looks like it should fir the bill more than fine. I was thinking of using either Goldpoint or DACT stepped attenuators if possible or using as good if not a better potentiometer.

What hurts is its completely dual mono meaning to volume controls and 2 input switchers.
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Showing 2 responses by rodman99999

TKD makes a very good stepped attenuator, with discrete resistors for each position. I've also used a lot of Alps and Noble controls in projects(less salty), but they are getting rare. See pages 13 & 14, of this catalog: (http://www.percyaudio.com/Catalog.pdf) Also- Understand the difference between an, "Audio" or, "Log" taper, and a "Linear" taper, as you may find that knowledge useful.(http://tangentsoft.net/audio/atten.html) (http://www.acoustic-dimension.com/tkd/TKD-main.htm)
And, since the subject came up; Percy also offers Shallco selector switches(solid silver contacts), for building either discrete resistor attenuators, or stereo selector switches. See page 13, of the aforementioned catalog. BTW: Should you decide to roll your own attenuator; Use either Vishay nude bulk foil, or Caddock Ultra-Precision resistors. They drive the price up, but will pay for themselves in transparency.