HP 1958 Model 153A High Gain Differential Amplifier Operating & Service Manual.

HP 1402A Dual Trace Amplifier ~ Operating & Service Manual

HP 1405A Dual Trace Amplifier ~ Operating & Service Manual

HP 01539-2 Model 1750A Dual Trace Vertical Amplifier Operating & Service Manual.

HP Dual Differential Vertical Amplifier Operating & Service Manual 1971

HP Dual Trace Vertical Amplifier 162A OPERATING & SERVICE MANUAL Hewlett Packard

Original HP 1750B dual trace vertical amplifier operating and service manual

HP 1401A Dual Trace Amplifier Operating & Service Manual