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
I previously had the same problem. I suspect your unshielded speaker cable is the prime culprit. Sometimes changing the placement of your equipment can make a difference as well.
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
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
While it may solve your radio problem, I am not so sure if lifting the ground on your preamp is a good idea for electrical reasons.

You may now have a system that is not grounded to anything anywhere. It could be a shocking experience if you become the ground if/when you touch the wrong thing.
>>"When I disconnet the IC from the power amp, NO RADIO!"<<
[Rloggie]
>>>>>>>

*****Try another pair of ics. I bet one of them has a broken ground return wire.*****

After you try another set of ics try the preamp with out the ground cheater.

I did not say this!! Sometimes the only answer to a problem is a ground cheater. That said, if you are using ground cheaters it is a good idea to unplug the equipment you are using the ground cheaters on, when removing, changing, ics from your equipment. In rare occasions people have received an electrical shock.

Post back with your results in regards to the change of the ics from the preamp to amp
Jim