[Elecraft] 270 foot (ish) Doublet & K3 ATU

[Bill W2BLC]

I use a 260 foot doublet fed with 600 ohm tuned feeder (4" spacing #14 
wire). It is run as an NVIS antenna - up 26 feet and flat. The K3 
auto-tuner and the KAT500 both tune it very well for 160/80/40/30 
meters. I do not use it on the upper bands. The feedline is about 25 
feet long and is terminated with a BalunDesigns 4:1 balun. 10 feet of 
RG213 runs from the balun into the house to the switch/lightning panel. 
If you have the optional RX board and AM filter, the antenna works great 
for the broadcast band too.

Bill K-Line