[TowerTalk] Mystery Beam

[KF0FN]

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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