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@telia.com>
To: <towertalk@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
>
,
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.
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_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
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