[GCARC] Problem with HamShack

[Kenneth Bozarth]

To me, it sounds like marginal RFI under "normal" conditions. Adding 90 deg
adapters will change the routing of cables. On HF frequencies, loss and
stray reactance should be negligible. As Al said, try better grounding.

On Tue, Sep 2, 2025, 7:37 PM Al KB2AYU via GCARC <gcarc at mailman.qth.net>
wrote:

> This does sound strange. Need more info. Is the bulkhead metal and is it
> grounded outside with a ground rod?
>
> You say RF went way up, does that imply that you have some RF even
> without the elbows?
>
> What is the SWR for the antennas with and without the elbows? I can't
> imagine it being different.
>
> Al
>
>
> On 8/31/2025 11:57 AM, Robert Pantazes wrote:
> > In my HamShack the RF cables come into the shack though a widow bulkhead.
> > To dress the cables I installed 90 degree elbow PL-259 type adapters made
> > by Amphenol. The first thing that I noticed is that the RF in the shack
> >   went way up. I tightened all the connectors with a wrench and the
> problem
> > still persisted.I removed all of  the elbows and the RF in the shack was
> > gone.
> > Amphenol specs don't show any information of loss.
> > As a note- I run a maximum of 500 watts on HF. I have 3 HF antennas: a
> HEX
> > Beam (20 to 6 meters), Doublent (40 & 80 meters) and a End Feed 60 and 30
> > meter antenna. The problem was on all bands that had an elbow installed.
> > Anyone see this problem with Elbows?
> > Thank you.
> > 73,
> > Bob, W2ARP
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