[RFI] 40M TVI problem
Jim Brown
jim at audiosystemsgroup.com
Mon Nov 13 11:50:42 EST 2006
On Mon, 13 Nov 2006 09:12:17 -0800 (PST), SERGE BERTUZZO wrote:
>Any assistance/guidance would be greatly appreciated.
http://audiosystemsgroup.com/publish
See the tutorials, with measured data, for ferrite chokes in several
common and useful configurations at the link above. What you
probably need is a choking Z of at least 2-3K ohms. Referring to the
data, a choke with 10-12 turns around a #43 or #31 2.4 toroid
(commonly called FT-240-size by resellers) should do the job -- IF
the RFI is coming in on the downlead. If it is getting in other
ways, you may need to do more. For example, if its coming in on the
power line, you may need a choke (like the first one) on the power
line. If its bad shielding, youre probably stuck with the bucket
treatment. ****
**** The bucket treatment. Find a bucket large enough to hold the
offending TV, and fill it with water. Put the TV in twice. Take it
out once.
Jim Brown K9YC
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