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Hp model 489A/491C operating and service manual
HP Model 489A/491C Operating and Service Manual
* Unit: HP Hewlett Packard Model 489A/491C Microwave Amplifier
* Serial Numbers: Prefix 972-
* Other Notes: This is a used Manual in good condition with normal wear and tear. It contains: General Information, Installation, Operation, Performance Test, Adjustments, Replaceable Parts, Manual Changes, Service, List of Illustrations, List of Tables.