40/20 meter trap dipole Coil Forms & insulators


Jim Sheldon
 

As promised, here is a ZIP file of the Fusion 360 design files and the .stl. 3D printable files for the 40/80 trap dipole end/trap insulators, trap coil forms (Wind with 15 turns of #20 enameled wire) and the parallel capacitor should be a 1KV Mica cap of 27 pF -- Look up the wire lengths for the antenna as it will vary for each individual's chosen frequency so not indicating it here.  Obviously will require pruning anyway as nobody has the same conditions for their installation. 

This is designed primarily as a portable dipole/doublet/inverted Vee to take on SOTA, POTA and other outings but depending on the material you print it with, it could have use in semi-permanent installations. 

Rudimentary printing instructions are contained in a text file within the ZIP archive.

Jim Sheldon, W0EB


Jim Sheldon
 

Please disregard the Zip file in the original post.  There are 2 problematical errors in the Center Insulators.  The SO-239 mounting holes are too far apart and the BNC mounting hole is too small in diameter.

Those files have been corrected and the ones in the attached ZIP archive are now correct.  Please use this one and not the first one.

Thanks,

Jim Sheldon, W0EB


Jim Sheldon
 

Some pictures of the center insulators - one for an SO-239 and one for a BNC connector.  The blue one is for the SO-239 and the grey one is for the BNC.  It was quicker to print them both at the same time (different printers) so I could get the corrected files tested and posted.

Jim, W0EB



davemrtn
 

Jim, Thanks.

I was able to open all the F360 files.


David Martin - NA1MH - Mountain Home, Ar. -----------------------------------------
Wherever I go, there He is.


On 7/24/2021 11:04 AM, Jim Sheldon wrote:
As promised, here is a ZIP file of the Fusion 360 design files and the .stl. 3D printable files for the 40/80 trap dipole end/trap insulators, trap coil forms (Wind with 15 turns of #20 enameled wire) and the parallel capacitor should be a 1KV Mica cap of 27 pF -- Look up the wire lengths for the antenna as it will vary for each individual's chosen frequency so not indicating it here.  Obviously will require pruning anyway as nobody has the same conditions for their installation. 

This is designed primarily as a portable dipole/doublet/inverted Vee to take on SOTA, POTA and other outings but depending on the material you print it with, it could have use in semi-permanent installations. 

Rudimentary printing instructions are contained in a text file within the ZIP archive.

Jim Sheldon, W0EB