Re: [wsjt-devel] RFI

[Carey F. <car...@gm...>]

Jim,
Very interesting stuff!
I've been looking for an answer to this question for a while but no answer
yet:
RF getting into my stereo cause it to produce a 60Hz hum. Why is that?
Thanks, Carey, WB4HXE


On Fri, Mar 15, 2019 at 2:57 PM Jim Brown <k9...@au...>
wrote:

> As others have noted, EVERY conductor is an antenna, and most computers
> and rigs are built with manufacturing/design defects that couple RF from
> attached cables inside the the box to cause problems.
>
> Here is a tutorial on the topic, and an applications note for finding
> and killing RF noise. The same ferrite techniques for killing noise
> apply to killing RFI on cables in our stations.
>
> k9yc.com/RFI-Ham.pdf
>
> http://k9yc.com/KillingReceiveNoise.pdf
>
> And proper station bonding reduces RFI and solves other problems.
>
> http://k9yc.com/GroundingAndAudio.pdf
>
> 73, Jim K9YC
>
>
> On 3/15/2019 5:25 AM, Lester Sousley wrote:
> > I suspected RFI, but was confused as to why only on 30 meters.  I do use
> > chokes, but only on those cables connecting to antennas.  Thanks for the
> > reply.
>
>
>
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-- 
Carey Fisher
car...@gm...