[TowerTalk] Vertical balun

[Jan Erik Holm]

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
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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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