Hi:
I am planning to make a switched gain transimpedance amp, switched gain voltage amp, as well as a switched bandwidth filter based on op-amps and rotary switches. I'd like to use ITT MA00L1NCQD or Grayhill
56DP36-01-1-AJN from DigiKey.Both of these have silver contacts for the rotor. The ITT has silver stationary contacts as well. While at least the Grayhill has gold plated stationary contacts. In fact, even when ordering the "G" contact type from ITT, the rotor I think is still silver.
Alternatively, there is a bit more expensive ITT 50DP36-01-1-AJN which has all gold contacts.
Is silver unacceptable for circuits in which practically no current flows, such as an op-amp's feedback loop?
Thanks for input.
Good day!