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Uninvited radio station interference

I've just set up a tri amp tube system using horns for the midrange (2"TAD drivers), and have aquired a couple of radio stations through them. The amps, Cary 805b, have had the grounds lifted, the speaker wire is zip cord (waiting on final configuration before spending the money on better), the I/C's are stealth M7. Any ideas on where to start looking for the cure to radio interference? The zip cord? Thanks for comments.
rloggie

Showing 3 responses by rloggie

rloggie OP
102 posts
 
Well, after trying several variations on plug ins I lifted the ground on the preamp and the radio is off:) Thanks for getting me started and for all responses.

Robert
rloggie OP
102 posts
 
Hi and thanks for the response. I can not hear the radio playing when the amp is off. I can hear it when the amp is on and the pre is off, but its so low I wouldn't have noticed it. When the pre is on it is louder and noticeable. When the volume on the pre is turned up, even full, it is not any louder. The Stealth M-7 ic's are "standard double shielded" (from the website).
rloggie OP
102 posts
 
Jea48, I removed the ic's from the pre inputs, no help.

I added a MIT powercord with, I think, ferrite at both ends, to the preamp, no help.

I ran the amp with the pre off, no help.

When I disconnet the IC from the power amp, NO RADIO!

I guess this eliminates the zip cord as the problem.

The preamp is a DEQX three way crossover and pre that I need in the system, but the radio seems to be comming from it. It's pluged into a Power Wedge 116. I'll try moving some of the power cords around to see if this makes a difference. Any other thoughts?

Thanks,
rloggie
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