HP 182C Oscilloscope Repair - Part 1: High Voltage Power Supply "Accident" скачать в хорошем качестве

HP 182C Oscilloscope Repair - Part 1: High Voltage Power Supply "Accident"

We begin the restoration of a gorgeous HP 182 oscilloscope, which takes a turn for the worse when an ElectroBOOM event destroys the high voltage power supply. Which is fine, we just have to un-destroy it. HP 182 Repair Playlist:    • HP 182C Oscilloscope Repair   Stuff that supports the channel: Support us on Patreon:   / curiousmarc   Amazon links for the tools I use in the lab: https://www.curiousmarc.com/amazon-links Channel merch on Fourthwall: https://curiousmarc-shop.fourthwall.com Legacy channel merch on Teespring (I don't have everything transferred to Fourthwall yet): https://teespring.com/stores/curiousm... "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: https://www.youtube.com/curiousmarc/a... 00:00 HP 180 scopes history 01:45 Initial evaluation 03:54 Power supply tantalum caps checkup 05:07 Power supply electrolytic caps checkup 07:46 Connector repair 08:24 Damaged rail repair 09:22 Power supply frame repair 10:55 Power supply adjustment 12:07 High voltage power supply adjustment 13:21 High voltage electroBOOM 14:51 Why did it arc? 16:43 HV supply schematics explanation 19:31 HV control board repair 22:49 Still no HV oscillator 23:10 Changing the HV transistor, new fault appears 24:32 Try again, still no HV oscillator 26:28 Workaround to start oscillation 30:02 Debugging the blocking oscillator starting problem 32:18 Now it starts, but then it blows up! 32:30 Checking open loop operation, seems OK 35:04 My new HV diode must be too good 37:18 My new HV transistor must be too good 38:21 3kV repaired 39:37 18kV still arcs 40:17 HV repaired, but now we have a new fault! 41:38 More repairs needed in the next episode