Perusing MRAM’s antenna pages linked below, I noted this: “…checking the B & W website (they make Mini-Ductor) the dimensions and wire size…”
“Barker & Williamson has been a recognized leader worldwide in the manufacture of the highest quality HF broadband antennas, fiberglass masts, air wound coil stock, and other radio parts for military, commercial, homeland defense and amateur use since 1932. ”
“Our Miniductor line of air wound coils are made from tinned soft-drawn copper wire and wound in flat ABS plastic strip. The Miniductor has 1/4 turn hookup leads and is intended for lower power applications.”
Well, I’ll be…
Miniductor
Yes, I’ve known about them for years, as I’m sure many others here have. However, have you checked prices?
Roll your own air core inductors
Make your own:
http://www.arrl.org/tis/info/pdf/9708033.pdf
I usually use #14 or #12 bare copper wire. A little copper cleaner/polish (I use Twinkle brand) wiped on and wiped off leaves a wax coating which keeps them shiny and still allows soldering.
Neil