[TowerTalk] Vertical balun

[AA6DX]

Here's interesting info on the subject, even using LED..   73 .. Mark
http://www.antentop.bel.ru/004/trap_004.htm
----- Original Message ----- 
From: "Jan Erik Holm" <sm2ekm at telia.com>
To: <towertalk at contesting.com>
Sent: Friday, December 19, 2003 7:40 AM
Subject: Re: [TowerTalk] Vertical balun


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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