[Elecraft] KAT 500 and open wire

[Bob McGraw K4TAX]

Yes I use a balanced feed line being the "window" type line.   It feeds 
a 250 ft wire in the center at 50 feet.  I have about 75 ft of feed line 
from the center of the antenna then,  through the attic eve vent, 
supported on some wooden hangers I made and attached to the roof 
rafters.   Then it drops through the ceiling to the balun which sits on 
the shelf above the KPA500 and the KAT500.   The balun is a Balun 
Designs 1:1 ATU current balun rated at 5 kW being model 1171t.    I use 
a common mode choke, being model 8232 purchased from The Wireman.   It 
runs from the balun to one of the tuner 3 outputs.   Works great from 
160M through 10M.

Of note, I am on the 2nd floor of a wood frame house more in the 
center.  No windows or walls to the outside.    I do not use any type of 
"station ground" to the outside.  I do have lightning protection devices 
where the feed lines and rotor lines enter the house.   As the antenna 
and feed line is quite well balanced, there is no RF radiation in the 
shack an thus no RF issues with computers, phones, TV's, surround sound 
systems, and such.   Each piece of station equipment is bonded to the 
station power supply ground terminal using a dedicated ground jumper.   
The 3rd pin AC ground is maintained and the amp runs from a dedicated 
240 VAC circuit.

Works great!

73

Bob, K4TAX


On 1/6/2019 10:59 AM, Viggo Magnus Nilsen Nilsen wrote:
> Hello Elecrafters,
>
> Do some of you using KAT500 with open wire,ladder line feed to ur wire
> antennas with balun  (outside the tuner) ? working ok ?
>
> 73' LA9NEA  Viggo M.
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