Pete,
For your "elegant single component" look at http://n4xm.myiglou.com.
73
Paul N4XM
At 04:46 AM 6/15/2004 -0600, you wrote:
>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
>
>
>_______________________________________________
>CQ-Contest mailing list
>CQ-Contest@contesting.com
>http://lists.contesting.com/mailman/listinfo/cq-contest
>
>
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
|