Why are the two measurements not taken in the same display format? One
graph is in SWR one is in RL.
Tony VE3DWI.
On Tue, May 19, 2020 at 17:24 Roger Need via groups.io <sailtamarack=
[email protected]> wrote:
On Tue, May 19, 2020 at 12:48 PM, <sj@...> wrote:
I would say NO.
Sorry to say, but have worked with VNA's for 30 years and as soon as you
come
near 1/8 wavelength the measurement errors are taking over.
I respectfully disagree. My NanoVNA was calibrated from 2 to 50 MHz using
NanoVNA Saver. Then I measured a 20M dipole at the feedpoint and saved the
results as an S1P file . I added 55 feet of RG58 to the NanoVNA and
re-calibrated at the end of the 55 feet of coax. Connected the antenna to
the RG58 and saved the results. Then plotted in NanoVNA Saver using both
sweeps (one as the reference). The results are in the pdf file below. It
is almost a perfect overlay of the two sweep measurements so the 55 feet
was successfully calibrated out.
Roger
Tony. VE3DWI