As I explore the world of Parks On The Air, I find that the time it takes me to set up at a park takes away from my potential operating time. The first two modifications to my procedures will be the antenna system and the packaging/carrying of the radio and tuner.
I have a 25-foot telescoping fiberglass mast arriving this week from DX Engineering. That mast has (purportedly) a 2.5-inch outside diameter at the base. When I can’t throw a wire way up in a tree, I’d like to use a drive-on mast mount. Most of the drive-on mounts I’m finding are too small inside to fit this particular mast. They are also expensive. I am probably going to explore fabricating my own drive-on mount.
But first up is my low-cost tactical radio carrier: a milk crate. In the photo below, I have birch plywood resting on wood cleats. The cleats stiffen the box but they do take up some interior space. They are secured to the box with 10-32 x 2 inch round head machine screws with a #10 washer, landing in 10-32 x 5/16 inch tee nuts. The screws were too long so I lopped off the excess material with a reciprocating saw and a metal cutting blade.
The shelves are not secured. So far, that has worked out okay as I can slide them in and out for making connections at the back of the radio and tuner. The shelves haven’t slid out while I’m driving. I will be adding hook-and-loop tape straps to the shelves to help hold the devices in place. The depth of the crate is a little bit light for my Yaesu FT-450D but it works well enough. I added a cleat on the top of the crate to help when carrying it to/from a picnic table. (That cleat is secured with Nylock nuts because I ran out of tee nuts.)
This cheap solution to speed up moving the station from my desk to the car and then to a park picnic table (or leaving it on my car seat) has worked, but as noted in the title, this is version 1.
Version 2 used aluminum channels riveted to the milk crate to hold the shelves. Unfortunately, pop rivets sometimes leave a chunk of expanded material in place so version 2 was flawed before I completed the first two aluminum channel cleats.
Version 3 will be in construction in a week or so. I found some 3D-printed shelf brackets for milk crates on Etsy that I’m going to try. On these small crates, there are only a few places where a pair can be mounted to support a shelf. It looks like I’ll end up with a shallow shelf on the bottom and on the top, with a large opening in the middle. I think one shallow space will fit my LDG YT-450 tuner (and if not, my other/smaller tuner will definitely fit). The other shallow space will hold a Chameleon LEFS (Lightweight End Fed Sloper) antenna and coax cable.
Version 4 is still in my mind, but I’m leaning toward some long galvanized tie plates with the ends bent 90-degrees and then riveted through the walls of the crate.
Another improvement will be some 90-degree coax connectors for the back of the radio and tuner, plus changing out my coax jumpers for very short lengths of flexible RG8X cable.
I'm still fiddling with the milk crates. If they were a little bit narrower and a little bit deeper they would make a better base for a rugged "to go" cage.
I did try the 3D-printed shelf brackets from an Etsy shop but they aren't quite what I expected. In looking at them, I realize now that I could cut small square biscuits of wood to fill the grid in the side of the crate and then have a simple rail on the inside and a backing strip on the outside, all secured through the biscuits. I might explore that as it opens up a bit more flexibility in shelf spacing and it's relatively simple and rugged.