In preparation for a few dozen contacts in the ARRL November Sweepstakes, I wanted a multi-band vertical. I’ve long been a fan of Callum M0MCX who manufactures the real DX Commander. Callum is kind enough to open-source all of his assembly manuals, so it’s easy enough to replicate his antennas.
SWR on 10, 20, and 40 were pretty close to designed sweet spot after a few iterations.
More details in the December Signal. Yeah, I’m a tease…
de KK1X