[Antennas] Telescoping J-Pole

[David]

If you have, say, a design for a 1/2" in diameter copper pipe J-Pole, you
can't go too far wrong starting with that length for the total antenna.

I would try keeping the little 'u' ("J") portion in 1/2 inch and split the
say, other ~36" length in 3 equal parts ~12" each (1", 3/4" & 1/2"
pipes)...realizing that the larger diameters cause the radio/swr length of
the long member to be slightly shorter....

Then, with a swr meter or whatever, trim the top 1/2" pipe section to
middle of the 2M band.






On Wed, February 17, 2016 10:59 pm, charles berry via Antennas wrote:
** I would like to build a 6m J-Pole. Â I do not have enough copper to
build from one piece of similar diameters. Â I do have enough if I taper
with 1", 3/4" & 1/2" pipes. Â Any suggestions as to the lengths of each
section? Â 
** Thanks,ChuckN7CHS
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-- 
David B.