John K. Browne wrote:
Thanks for the inquiry. It depends on the make-up of the "noise". These
filters are mainly for Radio Frequency noise but they work over a very
wide frequency range and have solved problems similar to yours in the
Of course there is no guarantee that it will solve your noise problem.
John K. Browne
After reading your page about line noise, I started looking at the way I
had everything hooked up:
I have 3 phone outlets, one of them was hooked
up but not in use, I unplugged that one. Another one had a caller I.D.
box, an answering machine and a cordless Sony phone hooked up to it. All
of the wires including the power supply's extension cord, phone
line..etc. were all shoved together in a big pile behind the couch! So I
separated all the wires real good so that the power lines would'nt be
next to the phone lines and also replaced a couple thin insulated phone
lines with some thicker ones. I then checked my line noise and it's one
hell of allot clearer! I also checked the line running to the computer
and it already has some kind of small filter on it? But thanks for your
response and willingness to work with me on it! It's not everyday that
you can find someone who will give their time to help for free.! If
I still have problems I'll e-mail you for the filter. Thanks, Rod
Thanks again for your letter. I finally got an RF engineer to look at the
problem and after tightening some wires at the point of entry into my house, the RFI virtually
disappeared! He thinks a loose connection was causing the signal to be rectified, (at least I think
that is what he said.) Anyway, the problem is fixed and I can go back to work. I'll keep the
information you sent me for future reference, in case other problems arise with new equipment that I
purchase. The AM tower is still very close. Thanks again.
Best regards, Ed
Click on the picture for RFI filter construction.
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