Bob, I have had good results using toroids around the computer cables, especially those that go from receiver to computer and an ANC-4 Noise Cancelling unit. Also have the receiver well grounded. Good luck. Linda Brodsky Malverne, NY ---------------------------------------------------- Sign Up for NetZero Platinum Today Only $9.95 per month! http://my.netzero.net/s/signup?r=platinum&refcd=PT97