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Yes I managed to calibrate my EFIS in the matter of altitude up to 4000 feet. Please see you PM and mail me - then I will do my best to explain. Regards Christian Denmark

thx for the suggestion. Is there no chance for calibrating the altimeter? in a easy way...

Dear all I Have got a used Blue Mountain EFIS G3 - but the altitude calibration is some 200 feet off - how can I find the values for recalibration to the long calibration-table? All help is very appreciated. Pilot from Denmark, flying an old Stinson YM1939 HW75 (Baby Stinson)