[Elecraft] balanced tuner

[Geoffrey Mackenzie-Kennedy]

David Woolley wrote on Sunday, August 17, 2008 at 1:02 PM

> Actually one might put them on the input, in the sense that one might have 
> a balanced feeder at close to 200 ohms and a balanced tuner at the antenna 
> end.  That's probably the only case in which they would work well.  (Given 
> that good balanced feeders are rather more than 200 ohms (although twisted 
> pair is less), 4:1 is a compromise between easy engineering and optimum 
> match.

Good 200 ohm open wire line can be built using four wires in the 
cross-connected configuration, I have been using such feeders for long runs 
(kept under tension) at HF and 6m / 2m during the past 50 years. Leaves and 
small twigs can get caught between the wires, especially in the Fall, so the 
occasional inspection is required. Flashover has never been a problem in my 
experience even while running a kW when living in Canada.

73,
Geoff
GM4ESD