[RFI] ALL-BAND RFI SNOOP ANTENNA for NOISE

[Bob Tellefsen]

Charlie
I think you will have trouble doing all that in one antenna.
I suggest three antennas--BC, 80m and 40m.  Unless you need to look
at frequencies in between as well.
While the individual loops can be made to tune over a fair range,
I'm less certain how far you can maintain the null once set.
Good luck and 73
Bob N6WG

-----Original Message-----
From: rfi-bounces at contesting.com [mailto:rfi-bounces at contesting.com]On
Behalf Of n0tt1 at juno.com
Sent: Wednesday, November 26, 2003 9:31 AM
To: RFI at contesting.com
Subject: [RFI] ALL-BAND RFI SNOOP ANTENNA for NOISE


Hi Gents,

I want to build a snoop antenna to track down some
RFI.   I want to listen from the bottom of the AM broadcast 
band to perhaps 7 mhz and I want the antenna to be
directional, portable, hand-held...a cardioid pattern will do.

I'm thinking of maybe using a untuned loop antenna  with
a "sense" antenna.  (Of course a rather robust pre-amp would be
needed.)

Any suggestions on the type of antenna to use or not use?

I would be using this with the very portable FT-817.

Thanks,
Charlie
N0TT

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