Thanks to all for the advice.
I have a whole load of rubber duck antennas that I'm checking so see at what range they should work best.? Some of them I don't even know what band they're supposed to be designed for.?? Good learning experience for using the Nano.
Ken, W4KRR
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On 4/22/2025 6:25 PM, Russ via groups.io wrote:
On Tue, Apr 22, 2025 at 08:10 AM, Kenneth Roberts wrote:
I'm new to the NanoVNA H-4.? If I calibrate for SWR in the range of 144-174,
and then I change the range to, say, 144-148, do I need to re calibrate?
I always do, just to obtain as much accuracy as possible.
Also: Be sure to calibrate to the end of the coax at the antenna. Coax will influence the measurements, especially if it is longer than a wavelength. (unless is is electrically an odd multiple of a half wave.) You will find your measurement make more sense at VHF/UHF frequencies with the NanoVNA calibrated to the antenna end of the coax.
