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Idea to reduce RFI

I live 1 block from the main mobile communication tower. That my speakers has pickup some radio channel though its only audible with my ear next to the speaker.

i am looking for any idea to reduce this kind of RFI. how bout an ferrite core? ERS paper? shield interconnect? shield power cable? which is most effective way as read somewhere in the forum that shield PC for amp causes dead sound?

line conditioner or iso transformer help with RFI or they only good to clean up power?

i have all ungrounded cdp , pre and amp. would shielding PC help with floating ground units to reduce RFI?

my system:
cdp cyrus 8x with psr (no ground from unit)
pre amc cvt 1030 (no ground from unit)
amp amc cvt 2100 (no ground from unit)
cd buffer yaqin 6j1
belden diy PC
lessloss PC
few diy shielded and unshielded PC
audio art ic-3
gabriel gold Rev
kci silkworm
xindak fs gold
spendor s 3/5
porter port outlet on the way

thanks in advance
milen007
bombaywalla's avatar
bombaywalla
1,958 posts
 
>> For more information on the subject, I recommend Bill
>> Whitlock's excellent papers (available at
>> jensentransformers.com), which I agree with the vast
>> majority of. I also highly respect the work of Douglas
>> Self and recommend reading all of his stuff . . . even
>> though on this particular subject I differ with his
>> conclusions.
Kirkus, thanx for the reading recommendations. I'll check them out.
milen007 OP
54 posts
 
Spencer, if power conditioners suck the life out of most amps, how bout isolation transformer?

Kirkus, thanks for the thorough explanation, thats really helps. I did change to better IC, it did eliminate the radio frequency, but hum still present. maybe its caused by my tube preamp.

anyone try bybee? does it helps?
sbank's avatar
sbank
3,382 posts
 
Milen,

Try it and let us know. I don't have any experience w/them. Cheers,

Spencer
sns
3,591 posts
 
My experience with using amps on isolation transformers is that they do suck a bit of life out of the music. Lack of attack and smoothed over sound. I've tried probably a dozen power conditioners with amps, none have worked thus far.

I did use Bybees in my former amps, at that time I didn't detect any downsides, couldn't really tell you if they affected RFI as that problem had already been resolved. I do have some Bybees ready to install in my present amp, just haven't gotten around to it.
milen007 OP
54 posts
 
i change some IC and it solve the radio frequency pickup. thx guys.

Any idea on reducing the noise floor further? i read bout dedicated lines but not practical for the at the moment.
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