[TowerTalk] Good vacation antenna

[Jim Brown]

On 7/3/2025 1:23 PM, David Gilbert wrote:
> 
> My suggestion would be the Chamelion SS25 25' extendable whip together 
> with this mount clamped to the side of the tongue of your trailer.  Put 
> a ground screw in the tongue if it's painted.  If your transceiver 
> doesn't have a tuner the one below works fine.
> 
> https://www.dxengineering.com/parts/cha-ss25
That looks like a great solution, Dave! I strongly suggest against a 
loading coil for 40M, using a tuner built into the radio instead, with 
or without some top loading. Loss in short lengths of decent-size coax 
on 40M is pretty low, even with significant mismatch. An excellent study 
in QEX about ten years ago showed that inductive loading at the base 
greatly reduces the radiation efficiency, because it's at the current 
maxima! The study included the construction of multiple configurations 
of loading, and very rigorous measurements.

73, Jim K9YC