A little different version of this question - is there any general
guidance about what to do with pickup on other antennas when
transmitting? Shunt the pickup to a dummy load? short? open?
something else?
I'm adding a vertically polarized pair of phased 80m delta loops (ON4UN
design) on one tower with a 40m Moxon and a 80m rotary dipole above
their apex.
Grant KZ1W
On 12/26/2012 9:33 AM, john battin wrote:
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: [email protected]
To: [email protected]
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.
_______________________________________________
Stew Perry Topband Distance Challenge coming on December 29th.
