[Boatanchors] Re: Boatanchors Digest, Vol 33, Issue 22

[George KB2Z]

Message: 7
Date: Thu, 19 Oct 2006 14:38:40 EDT
From: W4AWM at aol.com
Subject: [Boatanchors] G5RV QUESTION
To: Boatanchors at mailman.qth.net
Message-ID: <c9e.9a06db.32692030 at aol.com>
Content-Type: text/plain; charset="US-ASCII"


Hi,

I have just had my house trim wrapped with aluminum. I had my G5RV balun
mounted right at the peak of the roof which was originally wood trim. If 
I put it
back where it was, it will be against the new aluminum trim. Has anyone had
any experience with a similar situation and if so, does it cause any 
preformance
problems or higher SWR?

73 and thanks,

John,  W4AWM



Hi John,

I would have to say maybe. If its a toroidal, or coax balun, it should 
be self shielding. The type thats wound around 1 or 2 rods inside the 
1-1/2" pvc will probably have some energy absorbed by the aluminium 
trim. If you can get it on an angle bracket 4" from the trim it should 
cause no trouble. Or Faraday shield it with a soda or soup can if its 
the wound rod type. Just ground the can where the coax meets the balun, 
(through a hole in the middle bottom of the can) assuming your coax is 
properly grounded.

Good luck, George KB2Z