How about shielding the box? You said this has an integrated antenna? That
would mean that at least part of the case was transparent to rf. It
wouldn't surprise me if there was little shielding in it at all and that the
fm station is just blowing away an IF stage or just about anything else in
there.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: rfi-bounces@contesting.com [mailto:rfi-bounces@contesting.com] On
> Behalf Of kd4e
> Sent: Sunday, September 10, 2006 20:40
> To: towertalk@contesting.com; rfi@contesting.com
> Subject: Re: [RFI] Nasty RF Problem. Advice Please
>
> >> I tried shielding the antenna with the steel top off a 55 gallon drum
> >> while a co worker watched the signal, no difference.
> >
> > The 55 gallon drum top is much less than a wavelength at FM broadcast
> > band frequencies (3m, give or take), and essentially is
> > invisible. The signal will propagate right around and through it.
>
> I wonder if the framed screen from a large sliding glass
> door, using a ground strap, might work for the purposes
> of your testing?
>
>
> --
>
> Thanks! & 73,
> doc, KD4E
> ... somewhere in FL
> URL: bibleseven (dot) com
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