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Ham portable balun unun choke box

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Creation quality: 5.0/5 (1 vote)
Evaluation of members on the printability, utility, level of detail, etc.

  • 1.3k views
  • 27 downloads

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3D design format
Folder details Close
  • Balun_Case_BNC.stl
  • Balun_Lid.stl
  • Balun_Lid_100w.stl
  • Balun_t240_Box_BNC.stl
  • Balun_t240_Box_SO239_no_holes.stl
  • Balun_t240_Lid.stl
  • Balun_t240_SO239.stl
  • Choke_t240_Case_SO239.stl
  • Choke_t240_Case_SO239_no_holes.stl
  • Choke_t240_Lid.stl
  • Choke_t240_case_SO239_coax.stl
  • Choke_t240_case_SO239_no_holes_coax.stl
  • Choke_t240_lid_for_coax.stl

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Publication date 2023-03-31 at 19:29
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Published to Thingiverse on: 2022-01-31 at 15:38
Design number 1144913

Paul01

3D printer file info

3D model description

T140 & T240 versions

Case for making a portable balun/unun matching transformer capable of 100w when made with the below components.

FT140-43 FAIR-RITE FERRITE CORE TOROID RING
https://www.ebay.co.uk/itm/114198678549?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

1.25mm enamel copper wire
https://www.ebay.co.uk/itm/281724395117?ssPageName=STRK%3AMEBIDX%3AIT&var=580729423448&_trksid=p2060353.m2749.l2649

100pF 3kv Ceramic Capacitor
https://www.ebay.co.uk/itm/284389639091?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

50 Ohm BNC Panel Mount Socket, Square Flange 4 Four Hole Female
https://www.ebay.co.uk/itm/153472277182?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

T140 version uses m3 bolts, nuts and washers used to clamp antenna wire using m3 wing nuts with the t240 version using m4 hardware.

This is a work in progress though is perfectly usable in its current form but do feel free to message me if you have any changes you think would be useful.

FT240 options now available, including choke versions for both enamel wire and a wider version for RG58 coax.

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