As long as the cables are connected tightly to the tower/tower leg
and shields are bonded to the tower top and bottom, you are not
likely to see any problem. K6SE used crank up towers with the cables
coming down the stand-offs without much reported problem but I don't
have any details on his system.
For several years in the early 1980s back in Ohio I used a half
sloper - the tower was certainly "hot" in that configuration and
there were no rotator/antenna switch issues.
73,
... Joe, W4TV
On 2014-08-27 2:19 PM, Herbert Schoenbohm wrote:
Larry if you use a 3 or 4 wire cage I understand that the cage itself is
what is doing most of the radiating and not the tower.
Herb, KV4FZ
On 8/27/2014 12:08 PM, Larry wrote:
I believe it was ON4UN that suggested running cables inside the tower
would help. I ran my cables inside but have not shunt fed my tower
yet so I don't know if that will really help.
73, Larry W6NWS
-----Original Message----- From: LB3RE LJ3RE Stein-Roar Brobakken
Sent: Wednesday, August 27, 2014 8:35 AM
To: Pete Smith N4ZR
Cc: topband@contesting.com
Subject: Re: Topband: Shunt feeding tower
How is inteference on rotor or relay boxes?I thinking 1kw generate
magnetic radiation into cables ??? How u solve this guys ?? Tnx
---Sent by iphoneLB3RE LJ3RE K3RAG ex: LA6FJAwww.lb3re.com ~ Rag ~
Stein Roar Brobakken
e-mail:post@lb3re.comhttp://la5o.wordpress.comwww.contesting.no
Reading about 3-wire cages and the like, I feel a serious case of shunt
envy. Mine is a single wire about 18 inches from one corner of my Rohn
25, connected to the tower at about 50 feet. I used an omega match with
a couple of 3 KV transmitting variables, because my tower is quite tall
for 160 (97 feet with 3 yagis, 2 on top) and I could not find a 50-ohm
point.It was absurdly easy to adjust and seems to work quite well at 100
watts. I'm sure there are better solutions (including Herb's), but this
was really simple.
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 8/26/2014 5:12 PM, Don wrote:
I would like to get on 160 this question most likely has been asked a
1000 time but I need information as how or can I shunt feed my 55 ft
rohn 45 .
Don
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