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.
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.
73, Jerry, K0CQ
On 8/16/2010 1:45 PM, Richards wrote:
Interesting... I was not aware they had something like that.
This may require a deeper look see.
I like the honesty of the catalog description when they say:
However, at 160/80M it is virtually impossible
to match this antenna from your shack because
of the low radiation resistance. If you are using
low loss coax, you will lose much power in the
coax and unun due to bad antenna mismatches.
Installed at the base of the 43’ vertical, AV-6110
will significantly eliminate these losses and put 1
60 and 80 Meter bands back within the tuning
range of the tuner inside the shack.
That sounds reasonable and accurate - not over stated.
PS -- I like the syntax of the last bit... "significantly eliminate"...
it is either Is that the same as "very eliminated" or just
"sorta alot eliminated" or what?
==========================K8JHR =========================
On 8/16/2010 3:01 AM, Dr. Gerald N. Johnson wrote:
Tou could always try the Hy-gain AV-6110
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