Topband: The AM Brick Wall

[Joe Subich, W4TV]

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.
See: <http://cliftonlaboratories.com/z10022a_high_pass_filter.htm>

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: 
<http://cliftonlaboratories.com/z10020_am_medium_wave_band_reject_filter.htm> 


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.

73,

   ... 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
> unobtanium?
>
> Tod, K0TO
>
>>
>> http://www.dallas.net/~jvpoll/Filter/TheAMBrickWall.html
>>
>
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