Advice on RFI with a new integrated amp


I need some assistance on my Exposure 2010S. The only input I am using is the cd player, but with volume turned all the way down, I am picking up radio signals. If I turn the dial to the moving coil phono setting, even though nothing is attached to it, I can hear radio pretty loudly.

The corner of the house where our stereo is in under the outside wires, and it sits right next to the terminal for our Verizon Fios -- not the most ideal location, but it
is the only option.

Using the CD pots on the amplifier, you can only hear the radio pretty faintly, when the volume pot is turned all the way down. If I am playing cds, you can't hear anything, but since when I switch to the phono/aux1 setting, as I mentioned, I am picking up radio signals, and
the volume is louder. From what I read (and hear), it appears that the phono pot (perhaps in cahoots with the moving coil phono stage) is acting as a antenna, and picking up signals, which are cross-talking
across the other inputs on the amp.

How would you recommend addressing this? I am currently considering
shorting terminators on the phono, and other output pots and found some terminators online (audiophilia article).

At first I thought it might be my changing the speaker cables, from very thick cables to the slimmer DMNs, but that would not explain why the RFI is louder at the phono input than any of the others.

Whatcha think? Does this make sense?

The other option would be RCA caps.

Thanks,

Marty
martyw
Marty,

Might be a waste of your time but I would go to HD or Best Buy and buy some cheap twisted pair speaker cable and see if it solves your problem. Flat ribbon speaker cable is prone to RFI,... works as a good antenna.

Another thing to check out is the radio station. Do you know for sure which one it is. If so give them a call and ask to speak to their engineer. Ask him if they are broadcasting also in AM. Also explain your problem to him. He may be able to help. At the very least he will give you the broadcast transmitting frequency.
I have some zipwire from best buy, but it is unterminated. The exposure only works with bananas. Is there any way to test it with the unterminated wire?

thanks -- Marty
Marty,

If the DNM speaker cable is acting as an antenna , in your situation, parallel wire (Zip cord) will more than likely do the same thing. Read page 11

You will need to use twisted pair cable. You might check Radio Shack for some cheap cable and banana plugs for testing. If it solves your problem then you can buy something better.
Jim