I got around to testing a printed "V" antenna base design today. The base was done with M10x1.5 threaded inserts, but I have adapters to permit use of whips with a 3/8-24 thread. This was an initial test print with modification. The current model is more refined.
I mounted the base on a fiberglass push-up pole with a ACME 3/4-5 threaded end, supported by a printed clamp on tripod. I used a couple of 102" telescopic whips, fully extended for the first test.
With the whips fully extended, it covers 11m @ < 1.5.
With the last segment of the whip shortened to 10", it covers 10m @ < 2.
At some point I will be testing with a 220" whip in the vertical position & the two 102" whips in a downward (45 degree) angle as radials. I think 12, 15 & 20m should be usable without a transformer or coil. A small loading coil should enable 40m (& maybe 80m?).
I mounted the base on a fiberglass push-up pole with a ACME 3/4-5 threaded end, supported by a printed clamp on tripod. I used a couple of 102" telescopic whips, fully extended for the first test.
With the whips fully extended, it covers 11m @ < 1.5.
With the last segment of the whip shortened to 10", it covers 10m @ < 2.
At some point I will be testing with a 220" whip in the vertical position & the two 102" whips in a downward (45 degree) angle as radials. I think 12, 15 & 20m should be usable without a transformer or coil. A small loading coil should enable 40m (& maybe 80m?).