[RFI] Nasty RF Problem. Advice Please

David Robbins K1TTT k1ttt at arrl.net
Sun Sep 10 17:09:04 EDT 2006

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

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net

> -----Original Message-----
> From: rfi-bounces at contesting.com [mailto:rfi-bounces at contesting.com] On
> Behalf Of kd4e
> Sent: Sunday, September 10, 2006 20:40
> To: towertalk at contesting.com; rfi at 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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