See the thread titled Shunt fed towers and common mode chokes, that
began on December 6, 2012.
I'm afraid you will be replacing that 4:1 balun.
73,
Steve, N2IC
On 12/25/2012 08:52 PM, Ron Spencer wrote:
Anyone have problems running a KLM antenna with the 4:! balun and
elements insulated from
Good afternoon, Peter!
Well, your comments make me even more suspicious that Ron's KLM balun has
been damaged by common mode current, induced in his 10m coax by 160m tower
current. Your 1/2 wave baluns, made of 1/2 Cellflex, should be much more
capable of withstanding the common mode currents.
Yes, I am quite happy with those home brew baluns, but there is a caveat
with them.
All the antennas are far too high in frequency and the tips are not long
enough to get the adjustment down into the middle of the band.
However, since SWR is not exceeding 2 across the band and the patterns are
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
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
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
- Original Message -
From: Tom W8JI w...@w8ji.com
To: Herb Krumich wa2...@yahoo.com; topband@contesting.com
Sent: Wednesday, December 26, 2012 3:08 PM
Subject: Re: Topband: Inverted L question
I am right now using an inverted L which is spaced about 4 feet away from
my tower. The
On Wed, Dec 26, 2012 at 3:08 PM, Tom W8JI w...@w8ji.com wrote:
At any distance less than 1/4 wave or so, which is around 130 feet, the
inverted L is coupled very tightly to the tower. At wider spacings, like
50-100 feet, the tower and things on the tower **sometimes** won't have
much
Yo Top Banders, Contesters, DXers, and lesser lights,
(Back by popular demand)
I've heard it firsthand, that up on Top Band, the propagation can be rather
scary.
But here comes a test that's above all the rest, and is best known as The
Stew Perry.
Conditions can be bad but the Q's can be had,
