We jury-rig a tube based AC probe for our HP 410C VTVM. Will it do better than our modern Keysight multimeter? (Answer: yes) Atkelar's Second HP 410C Restoration: https://www.youtube.com/watch?v=VlpNK7vdQKA Stuff that supports the channel: - Amazon links for the tools I use in the lab (supports the channel if you buy from there) https://www.curiousmarc.com/amazon-links - Channel merch on Teespring: https://teespring.com/stores/curiousmarcs-store - Support us on Patreon: https://www.patreon.com/curiousmarc "Elevator Music" Credit: Crinoline Dreams by Kevin MacLeod Our lovely sponsors - PCBWay: fast turn PCBs, https://www.pcbway.com/ - Electro-Rent: https://www.electrorent.com/ - Keysight: test instruments: https://www.keysight.com/ - Samtec: connectors: https://www.samtec.com/ - R&D Microwaves: https://rdmicrowaves.com/ Get more technical info on the companion site: https://www.curiousmarc.com/ Contact info: null