Uploaded October 2025 | Updated September 2026, 2 weeks ago
A simple job that somehow took all afternoon! Today I’m re-tuning the 160 metre leg of my 80 / 160 fan dipole — dropping the resonance from 1.94 MHz down to 1.85 MHz where the amp is happiest.
I’ll show how longer = lower (it still catches me out sometimes!), explain why the UK full-power segment matters, and talk a bit about impedance, quarter-wave 75 Ω sections, and matching tricks for low NVIS dipoles.
Original Build: youtu.be/PV5GdAZ1nfo
Expect the usual chuckles, dog balls, and unexpected wander into the woods…
Gear used: DX50 Kevlar wire, 75 Ω coax, analyser, and a mug of tea.
73, Callum – M0XXT
A simple job that somehow took all afternoon! Today I’m re-tuning the 160 metre leg of my 80 / 160 fan dipole — dropping the resonance from 1.94 MHz down to 1.85 MHz where the amp is happiest.
I’ll show how longer = lower (it still catches me out sometimes!), explain why the UK full-power segment matters, and talk a bit about impedance, quarter-wave 75 Ω sections, and matching tricks for low NVIS dipoles.
Original Build: youtu.be/PV5GdAZ1nfo
Expect the usual chuckles, dog balls, and unexpected wander into the woods…
Gear used: DX50 Kevlar wire, 75 Ω coax, analyser, and a mug of tea.
73, Callum – M0XXT
