Cleanup, restoration, and calibration of a Hewlett Packard (HP) 6 1/2 digit 3456A Digital Voltmeter.
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Hewlett Packard HP 403B AC Voltmeter Restoration
Another local Ebay find was this Hewlett Packard HP 403B AC Voltmeter in a protective HP vertical case. The case did an excellent job of protecting the meter over it’s now 48 year life.
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Cleanup, repair, and upgrade of a Hewlett Packard (HP)6200B power supply.
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Hewlett Packard 5300B Measuring System
Repairing and clean-up of a Hewlett Packard (HP)5300B Measuring System with a 5305B 1,300 MHz Counter module.
This was supposed to be just a clean-up project, but this one turned into a bit more work that I had expected.