An illustrated online book on Hewlett-Packard equipment

T1Covered by 1 source · first reported by Raspberry Pi / Arduino / Adafruit at 27 Oct, 19:30 UTC

A free 550 page e-book collects classic Hewlett-Packard test gear from the 1950s to the 1990s, with photos, schematics notes and restoration tips. Most of the instruments covered are ones the writer owns and tested. Sections cover voltmeters, including the 400H vacuum tube voltmeter and the 410C…