Hal Rosser wrote:
The idea of a single-conductor transmission line makes it an inviting
idea, but physically building the impedence matching sections on the ends
look like a real challenge.

A single-wire transmission line has a Z0 of a few
hundred ohms. A transformer at each end is all you
need for impedance matching. The single-wire section
will radiate but it's surprising to me how much power
can be delivered to a load at the end of the wire.

My Electronics Equations Handbook give the Z0 of a
single-wire transmission line as 138*log(4D/d) where
'D' is the distance above ground and 'd' is the
diameter of the wire. A 0.1" dia. line 30 ft. in
the air has a Z0 of 574 ohms.
--
73, Cecil http://www.qsl.net/w5dxp


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