2. amps-preamps
  3. 1301627003

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.
128x128systembuilder

Showing 1 response by atmasphere

atmasphere's avatar
atmasphere
11,566 posts
 
Switches make a difference in performance. The reason is that not all contacts are created equal- the best will be doubled up to increase contact pressure and area. So yes, the input switches can make a difference.

If you are really considering doing this sort of work you will want to consider that you want to make it worth your time. If I were you I would get an Electroswitch or Shallco part and build the volume control up from fixed resistors. Its harder, but beats the ready-made stuff quite handily. If you go this route, keep in mind that the switch you use should be a make-before-break variety.
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