2. amps-preamps
  3. 1241765620

Cardas-type caps or shorting plugs?

What is everyone else using on their unused input/output jacks?

I live in a relatively RF-noisy environment and want to minimize noise pickup or radiation from unused in/output jacks on my audio/video preamp-processor, analog and digital audio, as well as video.

I've obtained some Cardas caps for the outputs, as well as a variety of shorting plugs and RCA plugs loaded with with 75ohm resistors. I understand that some preamps like shorting plugs on the (unused) inputs, and some don't.

Finally, are the 75ohm-loaded plugs useful at all (maybe for unused digital & video outputs)?

Thanks in advance!

-Chas
chasmo

Showing 1 response by casouza

casouza
239 posts
 
Hi
Use shorting plugs on inputs ONLY, otherwise you may fry the preamp's output (depending on circuit configuration).
On the outputs Cardas non-shorting caps are OK.
The 75 ohm-loaded plugs make a great termination for that unused CD/DVD digital output.
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