In message , gb
writes
"Dave Piggin" wrote in message
...
Hi All. Any good links for building 4Mtr beams for portable work or
permanent. TIA Dave.

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Dave -

4 Meters is not available for amateur radio usage in North America. RSGB
would be a logical reference source ... or adopt existing 6 meter or
commercial FM broadcast (88 - 108 MHz) designs

A standard 1/2 wave driven element will be approximately 6 feet (or 2
meters) in length.

Uhm -rec.radio.amateur.antenna is a world-wide newsgroup

I find RSGB antenna designs to be disappointing. FM broadcast antennas
are too broad band. There is more mileage in scaling 6m designs, but you
can do your own better optimised design for 4m since it is only 500KHz
wide. I've an 11 element on a 15m boom -but its bandwidth is only
200KHz.

There is a good design here with construction details.
http://www.g1ogy.com/G4ZTR/4Mbeam/G4ZTR4mbeam.html

There are others if you search.

73 Brian GM4DIJ

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Brian Howie