[Elecraft] Intermod filter for the KX3

[Jim]

Rather than band pass filters, maybe try a good ‘ole low pass filter? Won’t work on two meters or maybe six meters, but I suspect most of the ambient RF is up in the VHF/UHF or above.  And if it’s in-band interference, a band pass filter won’t help either.

Used for the opposite reason - protecting us rather than our neighbors - than for what those LPFs were originally made and purchased.


73  -  Jim  K8MR



> On Jun 3, 2018, at 12:49 PM, Mike Parkes <mspmail2 at gmail.com> wrote:
> 
> Hey group
> I have an issue here and am wondering if a good band pass filter would
> help? I pick up so much sqawks and buzzing weird interference, grating
> machine sounds, on my KX3 on all HF bands, it is horrible in my setting
> (ground floor apartment in the city). I have the same issues on 2 meter
> handhelds, noise all over the band, trips the squelch making it nigh
> impossible to scan without the radio stopping on some ghost signal that is
> only intermod. Same story with the KX3 2 mtr module though I can turn the
> squelch up enough to keep the radio scanning without stopping on noise for
> the most part. Is there any hope for HF? Would some sort of HF band pass
> filter help my KX3? Or is the filtering in the KX3 already good enough? I
> can't make it go away with the built in KX3 noise filters. There is this
> one company across the street from me, some internet megalith place with
> sat dishes on the roof and I wonder if some of the noise is coming from
> that establishment. Anyway... thanks for any ideas... head for a park, a
> mountain peak... I know... :)
> 
> 73's Mike AB7RU DN17gp
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