Kurt wrote in news:%FPQh.1209$zC.237
@newssvr22.news.prodigy.net:

Hi,

Am trying a homemade 7 element handheld beam I'm making for 70cm
with .25" brass stock. Have a little junction box I have mounted on
the beam with a male socket so I can use a BNC cable for the radio
connection. Does it matter what size/type wire I use to connect the
socket to the brass element and the Gamma match element inside the
junction box? I want to use a socket so I can use different lengths of
cable as opposed to hardwiring the cable to the antenna.


Kurt, if the connection is real short, it won't matter much and will be
compensated by the gamma trimming. Keep in mind that the diameter of the
gamma arm and spacing relative to the driven element itself are very
important, and to the extent your connection is an extension of that, it
will become important if it has appreciable length.

Gamma matches are very sensitive to dimensions around the gamma arm, so
they are not a very good match for an antenna that might get knocked
around.

Owen

Owen Duffy wrote:
[snip]
Gamma matches are very sensitive to dimensions around the gamma arm, so
they are not a very good match

Pun intended? ;^)

for an antenna that might get knocked
around.

Owen

I agree; rigidity of the matching section is all-important. But, I don't
think it'd be too hard to accomplish, using a chuck of plastic/teflon
block... the gamma rod would be only a couple of inches long.

Bryan WA7PRC