These days SWL Denis F-11217 and ham radio operator F1USC report QSO made with an amateur radio operatoring in “Aeronautical Mobile” which is how we determine an amateur in flight, after the area code, the / AM is added.
PH9HB/AM regularly fly to northern Europe and is often active on 17 meters band, it comes in regular contact with radio amateurs from a Boeing 737-400 et 737-800. The airborne equipment consists of a Collins HFS900D which works on USB and AM, it can use 400 watts PEP. The antenna is of the shunt-fed slotted type, situated in the vertical end of the tailsection.
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