There is a problem. I had a 4 ele 40 and 5 ele 20m klm on a loaded tower. I
had a coax balun on the 40 ...... arced through the insulation where it was
taped to the boom and the neighbors reported to me there was a fire on my
tower. The coax was crisp.
The 20m beam had a klm balun and it failed .... not so dramatic ... but it
failed. I grounded the DE on both antennas at their center... made no
difference to their performance that I could tell... and the problem was gone.
I had to re-tune the tower because of the increased top loading.
John K9DX
> Date: Tue, 25 Dec 2012 22:52:43 -0500
> From: ron.e.spencer@gmail.com
> To: topband@contesting.com
> Subject: Topband: KLM antennas on shunt fed towers
>
> Anyone have problems running a KLM antenna with the 4:! balun and
> elements insulated from the boom (stock KLM config) on a shunt fed tower
> for 160? I ask because I have a 6 element 10 on the top of my shunt fed
> tower and now, after running a kw on 160, the antenna's swr has gone
> over 2:1 where before it was pretty flat at about 1.2:1 or so. Any ideas?
>
> Thanks
> Ron N4XD
> _______________________________________________
> Stew Perry Topband Distance Challenge coming on December 29th.
_______________________________________________
Stew Perry Topband Distance Challenge coming on December 29th.
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