Hackaday (unofficial) October 22, 2021 4:00pm Mystery HP Gear Teardown #teardown #hewlettpackard #hp #testeqiupment #hackaday posted by pod_feeder_v2 Mystery HP Gear Teardown What’s round, has what looks like a vacuum tube in the center, and was made in the 1950s by HP? We don’t know either, but [The Signal Path] restored one and shows us this mystery instru…
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