Regarding Observation 3806032 …
I am looking for help diagnosing the problem with my setup.
I have just finished a QFH antenna in copper tube. Used a nano VNA to optimise and managed to get SWR of 1.41 at 137.5MHz.
The best images that I can pull down are these grainy grey things with no image to speak of.
I think that the prob may be in the PI setup rather than the antenna.
Has anyone had experience with this fault?