Discovered Parks On The Air earlier this year as a hunter and with the purchase of a camper in the spring. I began to plan a portable antenna setup to operate with in conjunction with weekend getaways and longer vacation duration trips.
Initially I experimented with both a Buddipole and a remote tuned inverted L using an painters pole and a 2 inch receiver hitch bracket I fabricated. With 40m being the best overall band given current propagation, I set up the Buddi as a 40m vertical with 4 radials. Ultimately the Buddipole with a base load was not efficient enough and took to much time to setup. The inverted V while more efficient, I was looking for a quicker setup and the highest practical radiation efficiency.
Based largely on the performance of POTA activators I ordered a SpiderBeam 12m (40ft) collapsible fiberglass pole. And began to fabricate a new trailer hitch mount to support the pole while continuing to use the remote tuner, a SGC-230 which tuned the inverted L.
The vertical element is 37 feet of #18 stranded black jacked copper. There are 5 radials 30 feet in length made of #14 Flexweave. I have soldered on ring connectors on the vertical and the radials which makes for a quick hook up on the tuner.
The outcome has been fantastic I can setup in under 20 minutes with great performance on 20m to 80m.
During a recent 10 day trip I had time to read several antenna modelling books which have been on my reading list for some time. Having the time to model this setup I was able to confirm what I was seeing in practice. The antenna is efficient on 40m, has gain on 20m and while it will work on 60m and 80m the efficiency has dropped off due to being to short.
Theory aside empirical data is needed to confirm the models, a perfect job for one of the digital modes supported by Pskreporter. In the 20m plot below notice the hole in the middle of the country? I was operating in Arkansas at the time and the lack of nearby coverage as a result of a low departure angle is quite evident.
With a low departure angle <20 degrees DX should be within reach and is confirmed with a world view showing coverage into europe.
While not as efficient on 80m due to the overall length it is efficient enough for coast to coast coverage.
In closing for my operating style this setup works great, it is quick to setup and tear down and minus the tuner which I already had. Relatively inexpensive compared to the other station components and the costs to travel to activate.
All but your first image is showing “Stop! This image was hotlinked”.
Hello yes I was able to reproduce this it is being caused by the Facebook referral. Reach the page directly at http://morsetutor.com/2019/09/my-pota-setup/
Just worked you today on 40 meters. Great set up… 73
W8GMF you were at park k-3338
Thanks Garry for the contact, good times were had!
You were booming into Maine today! I heard you +21dB on 20m digital. Generally a signal like that comes from a beam on a tower, not a portable setup.
Thanks Joe it is an efficient antenna and thank you for the contact.
Jay Thanks for the great contact Monday -20 Jan. 20-20. Good 5×9 signal coming to Central Texas! We appreciate your efforts for POTA activation!
Thanks for hunting, will catch you at the next one.
Excellent setup sir. You’ve inspired me to do the same setup since I already had the spidermast fiberglass pole in my inventory. I went ahead and purchased an AH-4 tuner and #14 flex-weave wire. My one question is what are the components you used to fabricate the hitch assembly that you have the mast and tuner connected to? Thanks and 73.
I use 18 gauge for the vertical, the #14 was to heavy. Check out this posting for build parts and details.