Gary wrote:
I've looked at several commercial G5RV's and most seem to lack a balun
when the coax is connected to the 450 Ohm ladder line.

Some G5RV manufacturers know that most hams don't realize they
need a balun and a balun increases cost and decreases profit.

I would suspect
a 4:1 balun at the coax to ladder line connection would make for a
better operating antenna or perhaps running the ladder line into the
shack here to the 4:1 balun built into my tuner.

Nope, a 1:1 current choke is what one needs. For instance, the
resonant impedance at the coax/twinlead junction on 80m is about
10 ohms for a 5:1 SWR on the coax. A 4:1 balun would take it to
2.5 ohms for a 20:1 SWR on the coax. A 4:1 balun at the coax to
twinlead junction makes a G5RV worse, not better.
--
73, Cecil http://www.qsl.net/w5dxp

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