Compact EFHW antenna winder
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Compact EFHW antenna winder for 40m/20m/15m bands. It integrates thin coax cable, UNUN and wire in compact winder form.
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Model information
- Source
- Printables
- Category
- Electronics
- License
- GNU General Public License v3.0
I like the original OM2JU (http://om2ju.com) design and desided to change his model to comply with my needs.
I slightly changed the overall dimensions, extended internal part to accomodate bigger UNUN and possible antenna tuner. Slightly changed the geometry to accomodate more cable without overlaping on the side, avoid agressive cable bending and speeding up the cable winding.
The central part has enough space to install 49:1 UNUN and possible antenna tuning capacitor etc. 2.5m of RG174/U cable ended with connector is integral part of the winder and is winded inside first cable compartment. Second compartment accomodate 20.3 m of thin silliconized wire. For more detailed building instructions visit OM2JU page.
The actual arrangement is 85 g only and is perfect companion of my (tr)uSDX transceiver on SOTA/POTA backpacking tours.
Printing: I experimented with ABS material and Prusa mini printer in cardbox, 0.2mm structural layer and regular temperatures. Print is ok with slight delamination in internal curved edges. PETG/ASA are better suited materials for this model.