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Reply To: | Mike Duke, K5XU |
Date: | Mon, 29 Sep 2008 17:56:48 -0500 |
Content-Type: | text/plain |
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About 6 years ago, I used the 44 foot model of this antenna for nearly a
year, mostly at qrp power levels, and mostly from 30 meters up.
Both the 44 and 88 foot models work pretty much as claimed, but there is one
important thing to note.
Some 300 watt class tuners may melt down if you use them with 100 watts of
rf near the low end of the operating range for these antennas. That is, on
the low end of 40 meters for the 44 foot model, and on the lower end of 80
meters for the 88 foot model. I translated this to mean 40 cw, and 80 meters
below 3.6 or so.
This cautionary information came to me in an e-mail dialogue with the late
L. B. Cebik. He suggested that if I were planning to run 100 watts on the
low ends of 80 or 40 meters, that I do so only with at least a "good" 1.5 KW
class tuner.
Apparently, the upper ends of 80 and 40 are the realistic limits for this
type of antenna.
In defense of the antenna that I used during my first year in my current
location, it tuned easily and performed very well from 30 meters through 10
meters.
While it allowed me contacts on 40, tuning there was extremely touchy, and
the band width was very narrow, making retuning necessary with a move of
only 10 khz or so.
With all that said, I would try to fit one of these antennas into an attic
or a postage stamp yard before I would spend the big bucks that some of
these companies charge for "low profile" "neighborhood friendly" chunks of
aluminum with "top secret" matching schemes.
Mike Duke, K5XU
American Council of Blind Radio Amateurs
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