I quickly made a female 75ohm SOL cal set from 3 female SMA PCB edge connectors, the 75ohm load is two 0805 150ohm resistors in parallel which measures 75.36ohm with a multimeter. I then used my patched NanoVNAsaver and went through a SOL calibration with that set from 50kHz to 250MHz. Finally I measured the 75ohm load and my 50ohm calibration load. The 75ohm is displayed properly in the center of the Smith chart while the 50ohms is unsurprisingly now left of the center. Marker values show the correct impedance. All tests done with a NanoVNA V2Plus4
