1:1 Choke Balun With 3D Printed Enclosure

Depending on who you talk to some will say a 1:1 choke balun is not necessary others will say a must have. Either way your antenna system will never be hurt by having one. You can use a air choke made by turning coax on a cylinder but that will only be good for one band and it will not compete with a good balun made from ferrite rings or cores.

After doing some research on http://www.karinya.net/g3txq/chokes/ I decided on doing 12 turns on a type 31 ferrite. I suggest popping on that site and looking at the bands you plan to use and use the appropriate ferrite and turns.

I did bring it over to a friends place, he had a VNA analyzer and I wish I took some screen shots but it worked out well and it was on par with the site with regards to its choking capabilities across the bands I wanted.

Not happy with the enclosures I had in the shack I went and modeled up one with a curved top to help with rain run off.

Et Voila!...place this just after your antenna before your feedline goes to your radio and you should have great results.

Download the design HERE