Re: [TenTec] 450 ohm Feed Line - N5BEA

[Jason Buchanan <jsb@digistar.com>]

ac5e@comcast.net wrote:

I am thinking about getting one of these gizmos to make life simple:

http://radio-ware.com/llock.htm

But regardless of what I use to tie the antenna wire to the ladder line, 
am I going to get myself into trouble if I tie the center feedpoint of 
the antenna to my metal mast?  I plan to use a 2 foot plastic standoff 
along the entire length of the mast to hold the ladder line away from 
the metal mast but at the very top of the pole I will need to secure the 
dipole to something very strong to support 260 feet of wire and I'm 
wondering how much of a problem this is if it's secured near the mast, 
or directly to it at that one point...

> One note. There is a misapprehension that ladder line either won't radiate or it won't radiate (or pick up noise) if it has a 180 degree twist every 10 feet or so. Let me state unequivocally that any sort of twin lead will radiate, the wider the spacing between the wires the more it will radiate, and anything that unbalances the line will increase the amount of radiation. Twisting the wire MAY result in cancellation - and it MAY reduce the amount of noise pickup. But it's likely to have no effect at all. 

How much danger is there if I bring the ladder line through the wall of 
the house, along the ceiling of the garage (which is the 2nd story 
floor) and into the shack?  The shack is roughly in the middle of my 
house on the ground floor.  The ladder line will have to traverse at 
least 30 feet from the outside of the house to the inside to reach the 
shack.

Am I going to spew RF all over the inside of the house as the ladder 
line leaves the back of the tuner in the shack, through the garage 
(which is underneath a bedroom because there is a bedroom above the 
garage) and then outside?



Thanks!!

73 Jason N1SU

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