Topband: How to detune a wire Inverted L? How to 'detune'electrical fence

[Jim Brown]

On 8/15/2013 7:39 AM, Tom W8JI wrote:
> Depending on any networks or transmission lines between the detuning 
> switch and the element, the optimum termination at the switch might be 
> almost anything. 

If the antenna is close to a quarter wave, one rather easy termination 
is t make the feedline either a shorted quarter-wave or an open 
half-wave of transmission line. A halfwave of RG8/RG213 for 160M won't 
have much loss, and a simple antenna relay box (like W2VJN's 2X1 Top Ten 
box, which runs on 12VDC) would make it quite easy to rig. So simply add 
enough coax to reach either of those lengths and add the relay and 
control line that provides the short or open in RX mode.

The downside of this, of course, is that you can't listen on the TX 
antenna for diversity.  .

73, Jim K9YC