[TowerTalk] G5RV balun question

[Joseph or Ruth Patrick]

Good Evening John

 I would ask you after using your antenna system for 14 years with good results 
why are you considering adding a coax choke? Are you having a problem with RF in 
the shack? Are you having a noise problem that you did not have before? To 
answer your question if there is RF coming back down the shield coax choke may 
help reduce this. As to the noise if it is being caused by the first problem 
then fixing the first problem should help with problem #2.
The reason I ask this is I have had the same coax, feed line, balun, 
and HF antenna now for about 9 years. It also works very well and always has.
I look at it like this. If it ain't broke don't try to fix it. Now if you are 
trying to improve on the system then You may get some different answers. This is 
JMHO. Good luck and let us know how you make out.
 73 DE K4XZ Joe Patrick
God Made Man
Sam Colt Made Them Equal 




________________________________
From: John G. <af5cc at fidmail.com>
To: ham-antennas at yahoogroups.com; towertalk at contesting.com
Sent: Thu, May 10, 2012 5:39:54 PM
Subject: [TowerTalk] G5RV balun question

I have a homebrew G5RV type antenna.  The antenna wire is fed with 300 ohm radio 
shack twin lead, which runs to a Van Gorden HI-Q 4:1 balun, which then feeds 
RG-11 75ohm coax.  I have used this system for 14 years now with good results. I 
am wonder if adding a coax choke balun (several turns of coax wound up in a 
circle) would help at all. I would like to minimize RF on the shield of the coax 
(as well as noise it would pick up) and think the HI-Q balun should do this, but 
would the coax choke help as well, or just be redundant?

John AF5CC
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