HP 5245L Nixie Counter - Part 2: Repairing the king of Nixie frequency meters скачать в хорошем качестве

HP 5245L Nixie Counter - Part 2: Repairing the king of Nixie frequency meters

We continue repairing our very broken HP 5245L, and hit some really subtle bugs in this amazing all-transistor machine. Opening the Nixie decoder to reveal its many neons and photo-resistor tree is a special treat. 5245L Repair-a-thon Playlist:    • HP 5245L Repair-a-thon   Documentation on my website: https://www.curiousmarc.com/instrumen... 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/curiousm... Support us on Patreon:   / 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: https://www.youtube.com/curiousmarc/a... 00:00 Summary of previous episode 01:16 Board A21 gate signal repair 04:10 Why is it still not counting? 06:31 Board A17 fast counter repair 11:19 Still not counting right 12:28 Board A15 counter/display explanation 14:20 Taking apart the Nixie decoder 16:25 Board A15 counter neon bulb debug 19:22 Reset issue discovery 20:48 Nixie decoder reassembly and test 21:56 Board A23 reset debug 23:39 Reset fault cured 25:48 Repaired!