[NLRS] K1FO Yagi and UT-141 Balun ?

[Matt Burt]

Hi Kris  UT141 is pretty common stuff 
I bought some from W0UC at AU'2005 he may have some left in 5ft (I think)
chunks.  Otherwise last time I bought a 25ft piece from Down East Microwave (it
 was more than what Paul charged at AU) which is in stock there.
UT141 is pretty easy to work with roll it on a firm surface (I use my portable
wooden workbench) while cutting the outer shell with a really sharp knife xacto
or similar.  Kinda like cutting copper pipe.
As for the 'FO all the designs seem to do well.  Many of the modern gain
optimized designs are pretty closely crafted to the K1FO style.  I copied my HB
222-16 (K1FO design) out of the 1994 handbook.  Cost around $35 for the parts
(used nice boom tubing for TX towers) and built my own T match using UT141 and
a modified ground bar out of a 200A load center.  Antenna has been awesome one
of my favorites!  For 432 I have been using a 9WL with 28 ele on 21 ft boom. 
It works nice but to be honest for one antenna it is plenty long has lots of
gain and is just sharp enough beamwidth to lose stations if you are not
careful.
One thing that was complicated for me when building the 222-16 was drilling the
three piece boom for the elements.  It required a great deal of time, a special
drill press, work stands etc and yet still had some error in regard to the hole
positions.
Any way have a great time building!  I had the parts here to do something like
you are building at one time in history myself.  Good luck!

73,
Matt
KF0Q
EN44ea


Quoting christenson at charter.net:

> 
> 
> I need a little help finding and identifying (UT-141). It is used as the
> balun in the K1FO antenna for 432. Also, would like any input on this
> antenna. Is it worth it to build? Looks like fir a 33 element it would cost
> about $100 in parts or so. This antenna is in the Jan. 1988 QST. Also in the
> VHF/UHF antenna classics paperback.
> 
> Thank You,
> Kris
> KC0REO
> If it don't propagate, I don't operate
> _______________________________________________
> NLRS mailing list
> NLRS at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/nlrs
>