When I installed my Bencher Skyhawk Yagi (similar in feed to the F12's)
I wound my own 1:1 balun out of RG-213 coax. Here's a photo:
It's five turns of coax on a 5 inch OD paint can form. I used tie wraps to
hold the turns in place. And here's how I sealed the end of the coax:
This balun probably is not the best solution if you're gong to run QRO.
The coax center insulation will likely soften under high power and allow the
center conductor, wound n a tight circle, to migrate to the outside of the
turns and short to the shield. But for me and my 100W it has worked just
fine since 2001.
Gene Smar AD3F
----- Original Message -----
From: "Neil & Heather" <email@example.com>
Sent: Saturday, April 24, 2010 9:27 AM
Subject: [TowerTalk] Force12 C19XR
> GM all,
> I have a Force12 C-19XR I am rebuilding, and would like some
> confirmation on the "single-feed" hook-up.
> I'm 99% sure of what I need to do, but sure would hate to hoist this
> beast up 60' and find out I fed it wrong.
> On pg 11 of the assembly manual, it says to look at the drawings
> to see how feed system is attached...I got robbed... :)... no pics...
> Anyways, can someone with either a C19 or C31 send (scan) me the pic or
> a quick sketch off-list.
> Also, has anyone used a 1:1 DX engineering balun instead of the supplied
> Force12 balun with success?
> Thanks all...
> TowerTalk mailing list
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