We repair our 3 GHz Nixie frequency counter plugin, the HP 5254A. 3 gig, not bad for 1964! Things are spicier than with our previous and tamer 500 MHz plugin, so we have to break out the microwave test equipment. 5245L Repair-a-thon Playlist:    • HP 5245L Repair-a-thon   Documentation on my website: https://www.curiousmarc.com/instruments/hp-5245l-nixie-counter#h.ixw2jz3t1jtb 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 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 00:00 Summary of previous episodes 01:02 Into the broken 3 GHz plugin 04:05 Mechanical repair 07:52 First try 10:09 Multiplier repair 12:22 Second try 13:36 Multiplier alignment 15:36 Third try 16:27 Second mechanical repair and realignment 22:59 Fourth try - it works! 24:20 Measuring the Apollo S-band transmit frequency