In a message dated 98-05-19 00:23:24 EDT, dick.green@valley.net writes:
<< The mystery beam has a 2-inch diameter boom which totals 14 ft. 5 in. long.
The
>boom can be disassembled into three pieces. Both ends of the center piece
are
>swaged; the end pieces slide over the center piece and are secured with
clamps.
>The director end of the boom has a red plastic cap; the cap at the
reflector
>end of the boom is black.
>
>Each half-element is made up of three pieces of aluminum tubing, plus the
trap,
>each of which is secured to the next piece by an aluminum clamp. The clamps
use
>a machine screw and nut to draw the clamp up tightly. The traps each are 13
>inches long and have black plastic caps on each end. >>
Sounds like it may be a Hygain antenna when you describe the traps and the
clamps.
If it is a TH-3, it will have 2 traps per half element, use a beta match which
is mounted on the boom with the DE mounted as you described.
Jim Kf0fn
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