I redid the tests, the AA-230 consistently reads 1.5MHz+ higher than the Stick Pro. Loosening and tightening the connector does have an impact, but it's only around 100KHz. Same connector used on both meters and as I am using only the N connector? on both rigexpert units, I saw no reason to re-calibrate them as they should be factory calibrated to the connector.?
Regards
Chris VE4FU