It's measuring the 3rd harmonic which shows a nice low SWR. how far below 172 Mhz did you start your scan?
Joe WB9SBD
toggle quoted message
Show quoted text
On 3/31/2025 2:50 AM, hobride via groups.io wrote:
Hello everyone,
I have bought a NANO VNA H4 to build simple dipole antennas.
Now I have made a simple dipole antenna for testing. This should be tuned for 172 MHz. The total length is ~83 cm (2,72 feet), one leg is ~41.5 cm (1,36 feet).
When I now connect this antenna and try to measure it, the result is a lowest SWR (1.15) at 513 MHz.
Can this be possible? I am not a radio specialist. I am an IT guy.
I have flashed the NANO VNA H4 to the latest firmware (tried DiSlord and Hugen) and also calibrated it.
Perhaps I need to make further settings after flashing?
