On 8/16/2010 10:18 PM, Dr. Gerald N. Johnson wrote:
A 43' vertical is a serious mismatch on 160 and 80, its too short, has a
low radiation resistance and lots of reactance. That makes a tuner run a
high loaded Q and have lots of circulating current in its circuits.
Agreed. That kinda sums it up nicely.
I don't know what is in the $250 box, likely a loading coil with some
sort of switching like a series resonant circuit for each band to select
the right amount of loading coil. There wasn't a manual available for it
on line to learn more.
I could not find any details, either. I am thinking
I favor Mr. Salas's design - it is open, and apparently
has the imprimatur of the QST Editorial Board.
It looks, good, too.
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