[Elecraft] OT: Balanced Feedlines

Augie Hansen augie.hansen at comcast.net
Thu Jul 16 20:54:50 EDT 2009


Don Rasmussen wrote:
> Can anyone suggest a compact balanced line that can handle 1000 watts? I like the size of that Radio Shack 300 ohm TV line, but 100 watts is likely the maximum. I'd like to build a stealthy KW antenna. The 20m dipole radiating elements are so low to the ground that 3:1 SWR is the best I can get. If I tune this out with a tuner, there will be too many db's of loss over the 100 feet of feed required. I assume a KW would melt the TV line. Any suggestions?

DX Engineering (and other sources) sell 300-ohm window line, which 
easily handles 1KW. It is better for TX use than the RS stuff that is 
primarily used for receiving applications. I have used the window line 
for years for an 80-10 meter doublet without problems. When the line 
gets wet minor retuning may be required, and loss is greater than that 
of true open-wire feedline.

Gus Hansen
KB0YH



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