On Sun, 02 Nov 2008 03:22:09 GMT, Owen Duffy wrote:

If you did want to incorporate an impedance matching system that doesn't
compromise the portability you have described, you could try a twelfth wave
transformer with 29.3° of 50 ohm coax from the feedpoint, then 29.3° of 75
ohm coax then any length of 50 ohm coax to the transmitter.

For example, for 146MHz, that could be 137mm of Belden 9258 (RG8/X) then
139mm of Belden 1189A (RG6/U) then any length of 50 ohm coax to the tx.

Owen

Very nice. Here's a bit more on how it works:
http://ourworld.compuserve.com/homepages/demerson/twelfth.htm
http://ourworld.compuserve.com/homepages/demerson/12thfdbk.htm

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Jeff Liebermann
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