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Re: [TowerTalk] Vertical balun

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Vertical balun
From: Jan Erik Holm <sm2ekm@telia.com>
Date: Fri, 19 Dec 2003 16:40:50 +0100
List-post: <mailto:towertalk@contesting.com>
Indeed, I forgot about coiling up the coax, I´ve
used it many times, workes great.
Same here, no stores for UNUN, baluns and gizmo
stuff, however I have a lot of 50 ohm coax, besides
UNUN´s and Balun´s tend sometimes to send out
smoke signals.
The simpler the construction is to more reliable
it will be over time.

73 gl Jim SM2EKM
----------------------------------------------------

Ron & Madhavi wrote:

I stacked about 10 torroids directly below the feed point of my wire
vertical, but it didn't do a thing to choke the common mode currents. Seeing
I can't have a heavy coax coil balun directly under my elevated the feed
point (as the support mast is a flimsy aluminium pole on the roof!), I wound
the coax around a 3.5" dia 12" former at the point the feeder enters the
shack - Viola......it cured all my RFI problems. The former was the largest
dia container I found and stole from the XYL's kitchen!
I am certain that larger dia PVC pipe would be more effective.

One needs to improvise when you live in a place like Jamaica! No stores for
UNUNS, Baluns etc! In fact, I can hardly find 50 ohm coax here!

73,
Ron, 6Y5/4S7RO

,


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