Antennas

Mike O'Dell mo at ccr.org
Wed Jun 18 21:53:36 CDT 2014


Consider the Offset-Fed Dipole such as the G5RV

the feeline is a length of 450 ohm window line
that terminates in a choke or balun which 
transitions to 50 ohm coax.

it's commonly held that the window line forms
an important part of the radiator on certain bands.

If one had an antenna tuner with a balanced output
(eg, an internal 4-1 current balun), would it make
any sense to drive the window line directly from
the tuner? 

what if the tuner were designed for remote use
so the window line stayed well away from the shack
and the tuner was fed with the 50 ohm feedline?

is this worth the trouble of doing beyond
using something like a good G5RV with
the tuner at in the shack at the radio
end of the 50 ohm coax?

Note this is not a question about the G5RV per se.
one can find copious advice about the strengths
and weaknesses of the G5RV - some of it might
even be correct. (grin)

AlphaDelta makes a multi-wire dipole with 
multiple legs cut for different bands 
without traps.

any comments as to the AD vs an OCF dipole
(Windom, G5RV, etc) for a multiband wire antenna?
(assume tuner adjacent to the rig driving 50 ohm coax)

	-mo



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