Hijacking an old e-mail for new information ...
For those looking for solutions to eliminate/reduce overload from
nearby AM broadcast transmitters, Jack Smith, W8OZA at Clifton
Laboratories now has two interesting products.
Model Z10022A is 9th order 1 dB Chebyshev highpass filter that
claims 1.6 dB insertion loss at 1.8 MHz, ~ 30 dB at 1.6 MHz, > 40
dB at 1.5 MHz and ultimate rejection around 100 dB below 1 MHz.
The other filter is a band stop (band rejection) filter for the
AM band. The Z10020 allows reception below 540 MHz for those who
are also experimenting at VLF or DX the NDB band. See:
I have no connection to Clifton Laboratories but since the "how
to deal with AM interference/overload" issue pops up periodically,
I wanted to get this information into the archives in case anyone
else needs it.
... Joe, W4TV
On 1/22/2007 6:27 PM, Tod-MN wrote:
> Has anyone more information regarding the schematic and values for this
> filter? Is it commercially available or is it 'one of a kind' and made of
> Tod, K0TO
> Topband mailing list
UR RST IS ... ... ..9 QSB QSB - hw? BK