[RFI] Guidance on finding noise?

[Alan Higbie]

Ed ~

#1 -- I'm no tech savvy guy - -

#2 -- But once, while trying to isolate a noise picked up on a 20 meter
beam, I RFI sniffed around another antenna feed line (coax) from a separate
40 meter beam.  I was astounded to see how much hash was present on the 40
meter coax.  I don't know exactly what was generating the hash - or if it
was raising the 20 meter noise floor.

#3 -- But, so I figure why not take all that junk out of the picture - so
you can focus on the one band you are trying to cure.

#4 -- The unused coax could be disconnected in the station or at base of
tower - and then shorted across and to ground.

73, Alan K0AV

~

On Tue, Jan 14, 2020 at 8:24 AM EDWARDS, EDDIE J <eedwards at oppd.com> wrote:

> Alan,
>
> Question when disconnecting all antennas:  Disconnect at the antenna feed
> point?  All antennas or just the ones for bands affected?
> May be a challenge for those with towers who don't climb it themselves but
> hire climbers.
>
> Our power company RFI techs have not been asking for this to be done, so
> wanted to know more details on this aspect of your recommendations.
>
> 73, de ed -K0iL
> Omaha, NE
>
> -----Original Message-----
> From: RFI <rfi-bounces+eedwards=oppd.com at contesting.com> On Behalf Of
> Alan Higbie
>
> In addition to all the great ideas already posted,  you might also
> consider:
>
> (3) Once you've confirmed that your DF receiver has the same offending
> noise heard in the station receiver -  then disconnect all your antennas
> (transmit & receive) to get them out of the equation.
>
>