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Here are the
measurements to build your own full sized G5RV antenna, I am
using this antenna myself and find it very good, although I
feed the antenna at the start of the ladder feed with RG58 coaxial
feeder, I still get a good SWR across the HF 1.8 to 30Mhz bands
using a good antenna tuner.
Below is a diagram of the antenna with its
measurements. |
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The top section of
the G5RV is made up of two sections with a center insulator,
for the wire top sections I used 14swg copper wire, which
works very well, the ladder (open feeder) is 300 ohm type but
450 ohms good quality feeder could be used, both available cheaper
at most radio rallies, there is always some debate as to whether the
G5RV antenna needs a balun or not, I don't use one, but many
articles on the internet discuss this controversial issue, but get
the antenna built first and then decide for yourself, the connection
between the ladder feed and top sections must be soldered as
shown in the diagram and then protected from the weather
and elements by a coat of varnish.
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