Mast Monkey - Multiple Antenna Mount

thingiverse

Mast Monkey antenna mount. Named as such because, well, it kind of looked like a smiling toy monkey.This is a a mast topper for fiberglass masts with .75"/~20mm ID. It has 4 antenna mount points: one coming from the through-bolt (whatever threading you want), one with with a 3/8-24 whip mount (underneath is a female-female coax with a shielding tap for mounting counterpoise wires), a female-female UHF through mount, and the smiling mouth is for attaching something like a roll-up J-pole with a velcro loop. (I recommend not using all antennas at the same time given their lack of separation; this is intended to provide flexibility and not concurrent operation.) Intended for temporary deployments.Also requires: A hex-head bolt >= 1.75" long. I used a 3/8-16 thread, which is what the included nut is threaded for, you can use whatever 3/8 bolt you want assuming it's long enough and you have a nut for it. I used 3/8-16 because I have some thread adaptors that use that; 3/8-24 might be handier for more of a ham-radio common threading. The bolt is on the longer side to provide more lateral strength inside the fiberglass.Whatever types of connections you want to install; these should be relatively standard sizes but YMMV.Assembly: insert the hex bolt into the bottom of the mast monkey. Thread on a retaining nut on top. Press-fit into a fiberglass tube of the correct dimensions.