HP 00422-90009 1979 Model 422A Crystal Detector Operating & Service Manual.

HP / Agilent 00422-90009 1979 422A Crystal Detector Operating & Service Manual.

HP 11664A Detector Operating & Service Manual

HP 00422-90006 1969 Model 422A Crystal Detectors Operating Note Manual.

HP 8472B Crystal Detector Operating & SERVICE Manual

HP 11664-90044 11664A Detector Operating and Service Manual

Original Hewlett Packard 423B 8470B Crystal Detector Operating & Service Manual

HP 8472B Crystal Detector Operating And Service Manual 1978