[TowerTalk] 40M rotary dipole

[Dave Sublette]

Thanks for all the suggestions on the RF choke.  I read the article by K9YC and concluded that the best approach wold be to wind RG8X around 6 Fair-Rite toroids made from type 31 material and 2.4 inches in diameter.  The big problem is they are listed at over $17 each from the distributors.  I will need 18 of them eventually.  6 each for this dipole and two more yagis.  That’s a large price tag, but still cheaper (and better performing) than the commercial units available, according to K9YC.

I have (again at the suggestion in the paper by K9YC) sent a request for quit to Fair-Rite, asking what quantity I would have to buy in order to get “a decent price”.  It might work out that I could make a large purchase and offer kits of toroids to the group.  I’m not looking to make money.  I only want to have a good choke at the lowest price I can find.

I may put the antenna up with a temporary choke on it and replace it when/if I can get the toroids.

I will keep you informed as to what I find.

I appreciate your inputs on this project.  It’s been fun.

Dave, K4TO