[Elecraft] Balanced feedline - DC Isolator

[Don Wilhelm]

Dale,

While you could put a bias Tee in each side of the balanced line to make 
it work, you need to be aware of the impedance at the points in the 
feedline where the DC is taken off.  The isolating inductance should 
have 5 time (or greater) impedance at all frequencies of interest.

I assume you are running a multiband antenna, so it may be easier and 
simpler just to 'bite the bullet' and run separate wire for the relay 
control.

73,
Don W3FPR

On 2/11/2014 7:23 PM, Dale Putnam wrote:
> With a pair of KAT100s and a pair of K2s, I need to send 12v up the openline feeder to control a latching relay at the top of the tower. The easiest way would be to run the dc on the feedline.and it would be even easier.. if the isolator would stop the dc from continuing on through the antenna.. that is also a dc short, inone of its configurations. I can insert the dc in the shack.. with a coax "T"... but there isn't a coax place at the top of the tower.Thoughts or ideas?
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