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Old April 16th 10, 08:57 PM posted to rec.radio.amateur.antenna
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Default HY-Gain Trap Orientation th5mk2

On Apr 8, 6:00*pm, Chuck Forsberg WA7KGX N2469R wrote:
I am installing a used Hy-Gain th5mk2 tribander.
A previous owner added screws on some of the elements at the
boom to element clamp and between element sections.
This is not mentioned in the manual.

Unfortunately whoever added the screws forgot to make sure
the trap assembly drain holes point down. *They are up to
20 or so degrees from straight down. *Is this good enough
or would it be better to remove the screws so the traps can
be adjusted with the drain holes down?


Previous probably lived in a desert without rain/snow. If twere mine,I
would disassemble and set the traps so the holes are at the bottom
when the antenna is installed.

Most probably the antenna was on a tilting tower and was assembled
with the tower that way. Holes were down at that time! If you are
going to use screws again, the correct method is to drill the outside
tube, deburr it, assemble the way you want it, and then use an ice
pick or similar to punch a starting hole in the inner tubing and then
run the screw in. Much better holding power. If a pilot hole is
drilled in both tubes, together, wind vibration will enlarge the hole
and work the screw loose.

Paul, KD7HB
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