[Elecraft] Clever antenna tuning ideas wanted

[Bill Coleman]

On Dec 7, 2005, at 4:34 PM, Darwin, Keith wrote:

> My antenna is similar.  28.5' tall, ground mounted over twelve 28'  
> long
> radials.  Fed with 30 feet of RG-213.  With a tuner the system works
> well enough on 40, 30, 20, 15.  80 Meters is the pits.  Dummy Load  
> City!

One idea - there was an article in QST some years ago about using a  
trap to make an inverted L. Fellow had an 80m vertical. He added a  
trap for 80m and then ran a wire out horizontally.

You could probably do the same thing for 40m/80m. One pretty  
foolproof way to make a trap is to wind coax on a PVC form. There's  
even a freeware program out there to compute the length of the coax -  
Coaxtrap. Google for it.

If you're going to make 80m a habit, some 50-60 foot radials would be  
nice. K2VCO should also consider some longer radials.

Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr at arrl.net
Quote: "Not within a thousand years will man ever fly!"
             -- Wilbur Wright, 1901