16 SEP 2020 Rev 1
This is a current choke enclosure for one FT240 ferrite core wound with RG58 coax. For great information, see G3TXQ's (SK) http://www.karinya.net/g3txq/chokes/ excellent website regarding ferrite and winding selection.

This particular choke was 11 turns of RG-58 coax on an FT240-43 core from Amidon. When installed inline at the antenna, all my shack RFI problems were solved.

Fusion 360 and STEP files are included for your convenience.

73, Rod K7ZNM

Prusa

I3 MK3S

No

No

.3mm

3 perimeters + 15%infill