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Equipment  -->  Subject: Wire Winders for QRP

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ZL2BH posted in Equipment on 2020-10-20 06:21

Jim, What a cool device you have made and thanks for the tips re the wire etc
John
ZL2BH

ZL1LC updated in Equipment on 2020-10-05 14:48

I can 3D print Wire Winders which are ideal for lightweight QRP portable operation.  I have attached a photos of the type that I recommend.  The standard size is 250mm overall but I can make them smaller if required.  The 250mm version weighs approx 30g.  
The best wire to use is the really thin stuff, ( #534) from thewireman.com    He is used to posting to NZ.
Steal a bit of knicker elastic to hold the wire on and you are away.

https://www.youtube.com/watch?v=o8RoYrmr8o8 shows them (about the 8 minute mark,) and a 1:1 balun, which can also be made. 

These are printed in PLA which is fine for portable operation, but probably won't last forever if used in a permanent role.  Some things that I have printed and left outside are still looking great more than a year down the track.  Any random colour except brown or green, so that you can find them at a field deployment site.

Provided you wind on your wire in a figure 8 pattern, the great thing with these winders is that when you come to deploy the wire, you simply secure the loose end to the balun/unun or dipole centre piece, hold the winder through the round hole, and walk away letting the wire wobble off cleanly.

The biggest cost is the postage, which is $6 for an NZ Post bag.  I can get six winders in the bag easily.  These winders are priced at NZ$2.50 each which is basically covering costs.

Also, if you find something else on thingiverse.com that you'd like printed, email me. 

My email is jimreednz@gmail.com

Img 1085 original original
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