[CQ-Contest] 75 to 50 ohm balun

[N4XM Paul D. Schrader]

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
>
>
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