[MRCA] GRC-106 Whip Prep

[MilComm Guy]

I spent some time today getting the whip antenna prepped for use on the
GRC-142 shelter at the Weare NH rally.  Often these antenna base assemblies
get left out in the weather, they are not built to be left out and last
very long, the rubber and steel components degrade with sun and water
exposure.

If you are lucky the top and bottom should unscrew by hand, inside the
bottom cup is a plastic nut and washer, be careful to over tighten when you
reassemble.  A bore brush, drill and a 3/8 tap make the work much easier.
Use your favorite grease and assemble.  The mast sections are copper plated
steel and the copper plating is very thin, be careful when buffing them
clean not to overdo it, these mast sections are very expensive now, very
light coat of grease on the threads here too.  I cover them with a plastic
bag to keep the dirt off/out on both ends.

I am also attaching an article on how to improve the GRC-106 whip in the
field.  I know a wire antenna is ideal, but oftentimes in a cramped static
location such as a show the whip is necessary.
https://radionerds.com/images/c/c5/Army_communicator_Sept_1984_AN-GRC-106.pdf
[image: DSCN0209.JPG]
[image: DSCN0210.JPG]

Mark
K1HF
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