HP 3488A - Switch/Control Unit

Workshop Project # - HP3488A Since quite a few "legacy" devices I aquired came with GPIB (or older ones with HPIB) I set out to find a few useful tools aorund that system. Note that the industry still uses GPIB based devices, and so, most of what would be "cool" is also quite on the expensive side. I was quite happy when I found this switch/control unit for relatively cheap. Honestly, it was below 100€ including several modules. Imagine my surprise, when I wanted to start stocking up on modules too! Not a single one I initially found was below 100€... it took quite a bit of time and repeated searching to find the pile I have now. Still, I think over a few years and less than 1000€ is a good turnout. Though I still need the connector blocks for a few of the cards. There was an issue with one of the plug in cards that took a bit of mental effort to fix, and one issue that took finding the right replacement part. But overall, I'm happy how this one turned out. 0:00 - Intro / Welcome 2:33 - Disassembly and Overview: Case, Front Panel, Controller 4:40 - Disassembly: Frame, PSU, Transformer, Backbplane 5:55 - Heat Staked Front Panel / Cleanup! 7:48 - Power Switch: Disassembly, Clean, Assembly 10:40 - Voltage Selection Switch: Disassembly, Clean, Assembly 12:07 - Mains Line Filter Replacement / Power Connection Resoldering 14:33 - Recapping? Not this time! / PSU Overview 15:25 - Starting Assembly: Transformer / Backplane / Card Cage / PSU 17:20 - Power Wiring / Controller Card / Front Panel Cleanup and Temp. Assembly 19:13 - First power on! / Et tu, Lazy T?! / Self-Test / Heat Staking Front Panel 21:03 - Bottom Case Part / Switching? How?... / Modules! And More Modules! 23:40 - 44478B / Overview of Switching Control Input 25:18 - Problem on Channel 1! 27:15 - 44472A - Broken BNC Repair, Check, OK! 28:30 - 44470A - Relay 29:03 - 44471A - Generic Relay 29:37 - 44477A - Relay Form C 30:14 - 44473A - 4x4 Matrix 30:45 - 44474A - Digital I/O 31:35 - Remounting Shielding Tins / Connector Interface? 34:19 - Closing Lid / GPIB Test 35:10 - Broken Card?! Not while I can help it! 36:33 - Goodbye, Credits, Outtakes! Music (in order) My Train's A Comin' - Unicorn Heads Nine Lives - Unicorn Heads Wrong - Dan Henig Town of 24 Bars - Unicorn Heads Light Expanse - Unicorn Heads (YouTube Audio Library) You can support me with regular small donations on Patreon:   / atkelar   or by becoming a channel member! Or just occasional one time support via Ko-Fi: https://ko-fi.com/atkelar or using the "Super Thanks" feature! Thanks to everybody who signed up already!