We repair two Hewlett Packard HP 59501B units, and use them to transform a mundane 1960 HP power supply into a digitally programmable one. Stuff that supports the channel: – Support us on Patreon: https://www.patreon.com/curiousmarc – Amazon links for the tools I use in the lab: https://www.curiousmarc.com/amazon-links – Channel merch …
From: Retro Roundup