[Antennas] SWR Isn't Enough - Working in a high SWR setting

Dan Richardson [email protected]
Mon, 29 Apr 2002 08:08:22 -0700


At 07:31 AM 4/29/2002 -0700, you wrote:
[snip]
>The indecision is due to considerations for getting the
>ladder line into the shack to a manual tuner versus using a remote auto
>tuner under the eve of the house.
[snip]

You may wish to consider a method I use for bring the parallel line into 
shack that I have used for years and seems to work well. I use a short run 
(three feet in my case) of a parallel run of coax. On the outside of the 
shack I connect the ladder line to the center conductors of the coax and 
the two outer shields are bonded together but not grounded. On the inside I 
connect the two center conductors to a balanced tuner. The shields are 
again bonded together however they are grounded at the tuner. Although coax 
has a higher loss than the ladder line anything under six to eight feet in 
length would not be noticeable to any receiving station. The method also 
provides the additional advantage of being able to place the transmission 
line (the coax portion) in close proximity to conductive surfaces.

73
Danny, K6MHE