Birt from the “Hey Birt!” channel donated an HP 3438A digital multimeter. Let’s repair it and figure out how its dual ramp A to D converter works. My HP 3438A Service Manual Scan: https://archive.org/details/hp-3438-a-digital-multimeter-operating-and-service-manual/mode/2up HP 3478A Multislope II DVM repair: https://youtu.be/p1r5ze8Xcfw “Hey Birt!” Channel: https://www.youtube.com/@HeyBirt Stuff that supports the channel: …
From: Retro Roundup