At 4/28/2025 11:09 AM, you wrote:
The reason I contacted Commander
was because I was concerned with the lowest VSWR at 427MHz for a 449MHz
stamped antenna which I picked up second hand. They were able to look up
info from my antenna S/N and they said 427MHz was about right for the
6deg or so downtilt that was ordered for this antenna and the original
owner said it was purchased for a 6,000ft site with 6deg of downtilt.
Commander said older antennas were basically tuned lower in frequency for
downtilt with more downtilt pushing the resonant frequency
lower
Time to pull the guts out of this antenna & see the physics-defying
construction.? Perhaps they run feedline internally up to the top
& feed it from there?
*grabs popcorn*
Bob NO6B
