Pole Topper Elevated V/Vertical Antenna Base
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This model screws on a ACME 3/4-5 thread at the top of a telescopic pole & holds telescopic whips at adjustable angles
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I made this model to sit on top of a fiberglass telescoping pole tipped with an ACME 3/4-5 thread. This is the typical attachment mechanism for "painter poles".
The model has three positions for attaching bottom threaded telescopic antenna whips. The attachment points are sized for M10x1.5 threaded heat inserts. Use of a M10 to 3/8-24 adapter allows use of whips with that style thread. There is a provision for attachement of a SO-239 4 hole panel mount adapter. The SO-239 screw holes are sized for M3 threaded heat inserts.
The model allows the angle of the outside attachment points to be oriented as desired. The outboard antenna mounts are held in place with printed screws.
I first tested this build with a pair of 102" telescopic whips with 3/8-24 threads attached via adapters for M10x1.5 threads. With the whips fully extended, the antenna would cover the full 11m band with a SWR below 1.5. With the whips' smallest extensions set to 10", the antenna would cover the full 10m band with a SWR below 2.0. (see pics for analyzer displays). SWR is affected by the angle between the whips as well as their length. Experiment to find what works best for you.
I plan to test a vertical configuration using a 220" center vertical and using the 102" whips at a downward angle as radials in the near future to explore the various HF possibilities.
I recommend printing with a layer height of 0.2mm or less for best thread production. Use a high wall, top and bottom layer count for strength and depth for the inserts. I recommend wall/top/bottom thicknesses of 3mm or greater.
Avoid use in gusty or high wind conditions, especially if using a 220" whip vertically.
Fustion 360 source and .STEP files are provided in addition to the .STL files. STL files should print in their native orientation. I recommend tree supports from build surface only. Be sure to define a sufficient interface gap in the X/Y dimension for easier cleanup.
ETA: 05/07/2026 - Made a few tweaks to the Base model for better strength and usability. Source, .step & .stl files were updated.
The tripod supporting the push-up pole was this one: