[Elecraft] 20m Vertical on roof

[Fletcher, Paul]

Martin,

I'm no expert by any means but I would say definitely. Coupling between
conductors is at a maximum when they are parallel and a minimum when at 90
degrees (further reduced by distance obviously). Is there a way you could
mount the vertical away from their TV antenna (on your gable end if you have
one) or reorient the radials so that they are away from the feeder?

Another possibility is a Cobwebb which is supposed to cause much less
trouble with EMI and requires no radials (but it is 2.5m square)

Regards,
Paul (M1PAF)

-----Original Message-----
From: Martin.Evans at simoncarves.com [mailto:Martin.Evans at simoncarves.com]
Sent: 04 June 2004 10:49
To: elecraft at mailman.qth.net
Subject: [Elecraft] 20m Vertical on roof






I'm thinking of mounting a 1/4 wave 20m vertical on the roof of the house.
However it will be only 2 feet away from next door's TV antenna and one of
the ground plane wires will run parallel to the TV downlead, am I asking
for TVI trouble even though I'm only using qrp?

Martin
M0KWV
K1 #1534




Why not take a look at our Web site?
http://www.simoncarves.com

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