Ham portable balun unun choke box
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T140 & T240 versions Case for making a portable balun/unun matching transformer capable of 100w when made with the…
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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.
Print Settings
Printer Brand:
Creality
Printer:
Ender 5
Rafts:
No
Supports:
Yes
Resolution:
0.2
Infill:
50
Filament: eSun PLA+ Black
Notes:
Designed in Fusion 360 printed with an Ender 7
Category: Hobby