Difficult to use something that selective on HF.
I do a lot of PIM troubleshooting on DAS and the BEST method i find is tapping
connections/hardware with a rubber mallet while the systems is active. You
could remotely watch your secondary RX using remote desktop on your cell
Stephanie WX3K
> On Aug 8, 2021, at 3:19 PM, Steve London <n2icarrl@gmail.com> wrote:
>
> This is a little off topic from the usual, but the expertise in DFing on
> this forum is outstanding.
>
> I am a serious contester, and do lots of SO2R. That means I need to be able
> to listen on one band while transmitting on another band. With filters and
> stubs I have brought the harmonic and overload energy down to acceptable
> levels. However, I have recently developed a new problem. Something on the
> tower is intermittent and causing the level of the 2nd harmonic to vary
> many S-units as the wind blows or I turn the rotator on the 40 meter beam.
> When this happens it creates hash across the band. I have looked for the
> obvious, but no luck yet. Yes, it could be something loose on the 40 meter
> beam hardware, but before I take on the project of taking it down, I would
> like to pinpoint the source. I am a tower climber, so I can get close to
> everything on the tower. What are the options for something handheld, very
> directional, and not overloaded by the fundamental ?
>
> 73,
> Steve, N2IC
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