Topband: AM Broadcast Filter recommendation

[Paul Mcl]

Steve,

Probably not in the best part of the world to get a good price but I use
the AM filter on this page:

http://www.herostechnology.co.uk/pages/RF_Filters.html

I have 2.2kw (QRP compared to some) about 500 metre away on 1548khz to
block out.

Regards

Paul MM0ZBH





On Tue, 5 Dec 2023 at 21:20, Steve Muenich <srmuenich at gmail.com> wrote:

> Hi Guys,
>
> I'm looking for a recommendation for an AM Broadcast filter for my receive
> only input.
> Unfortunately I live 2 miles form 910 khz AM so their 2nd harmonic wipes
> out 1820. For the most part I work around it and stay up higher in the
> band.
> There are other stations in the area of course that I'd like to knock down
> their signal further.
> I'm currently using an older 20+ year old ICE BCB filter that when swept on
> my tracking generator only attenuates -25db at 1700khz. The band would be
> absolutely unuseable without it.
>
> My receive antennas are 4xHi-Z array and a single NE facing beverage
>
> I'm looking for a newer filter that has better performance and
> attenuation below 1800khz.
>
> Any suggestions?
>
> Thanks
> Steve, NA5C
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