Thanks to all who answered (CC list attached). I should have added the fact
that my feed line will be connected to a multiple HF antenna switching box.
All antennas will have a 50 ohm feed point impedance. Some are monoband,
others are multi-band. This calls for impedance matching from 1.8 to 30 MHz
to maintain a 1:1 SWR. Many responded with monoband solutions that involve
making up a large number of coax connections. Also, the run is over 300'.
I am already having to deal with resistive losses for the upper frequencies
(That's why I chose hardline, and CATV spools I obtained were free!), so any
connection losses in the coax run must be kept to a minimum. I was looking
for an elegant single component solution, off the shelf.
It appears that the simplest solution is to use the Amidon Unun concept. I
have sent inquiry to Amidon for the right product which will match the CATV
hardline cable through Unun and into a PL-259 female connection (WX0B switch
box). Their basic Unun products suitable for up to 2 KW throughput are
$59.95. This seems to be a fair price for a simple solution.
I looked up I. C. E. in Google and got 28,000,000 hits. Adding the word
"transformer" to the search gave me over 800,000 hits. None of these hits
led to a product, so I gave up on that one. Perhaps someone could offer a
more direct link to the I.C.E. web site idea.
73,
Pete
W0RTT
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