Who can please help me out?

For our school we received a King KR85 ADF receiver and a King KR21 Marker
Beacon Receiver from scrapped airplane.

We would like to put them into operation for demo purposes, but do not have
the pin-out of these two radio's.

Who is willing to help us?

Regards

Jan L.F. Bos
Sr. Lecturer
Leeuwenborgh Aviation Technician College
Maastrcht Aachen Airport (EHBK)