Jim Leder wrote:
A G5RV is really an inefficient collinear antenna, so it needs to be a
flatop, not a Vee or L. Model it and you will see it is a 'long' (on 20
meters) Extended Double Zepp.

Jim, your statement is a little confusing. I know you mean that the
G5RV is 1/4WL too long to be called an Extended Double Zepp on 20m.
An EDZ is a single frequency antenna. The 102' G5RV is an EDZ on 11.5
MHz. EDZ length = 1170/F. And, you're right, G5RV's perform better as
a flat-top.

My modified G5RV performs as well as my 130' doublet fed with ladder-
line, given the slightly different radiation patterns. I vary the
length of the G5RV series matching section as follows:

3.8 MHz 23 ft., 7.2 MHz 35 ft., 10.125 MHz 20 ft., 14.2 Mhz 29 ft.,
18.14 Mhz 36 ft., 21.3 MHz 27 ft., 24.95 MHz 29 ft., 28.4 Mhz 22.5 ft.
--
73, Cecil http://www.qsl.net/w5dxp

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