Dear WA1RKT:

For less than $1000 you may purchase and use a LPDA that will
accomplish what you specify. Several such antennas are on the market or you
could construct one from scratch.

Some positive aspects of a LPDA:
1. no moving parts
2. "instant" BW so you may use the scanning you mentioned
3. using anything that is at all of a reasonable size, the antenna
inherently has low sensitivity to minor construction and other errors (much
favored in ice country because their performance degrades slowly with ice
coverage - not found to be true with a critically "tuned" yagi)
4. performance as constructed is close to that predicted with NEC -
tweaking is usually just not needed (occasionally, the shorting strap needs
to be tweaked)

Consider the conventional solution for the BW requirements you have set
out.

The StepR antennas work, but questions remain as to how well and for how
long. If I were to go on a trip to a salt-water DX entity, I sure would use
their vertical right on the beach. In other words, they are a solution to
some problems.

Good luck. 73, Mac N8TT

--
J. Mc Laughlin; Michigan U.S.A.
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"Rick (W-A-one-R-K-T)" wrote in message
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I'm willing to spend $1000, if I have to, on a two element beam that
claims to work efficiently from 14 to 24 MHz (and beyond), IF it works as
advertised, because I have limited alternatives.