Apollo Comms Part 18: Solving the mystery of NASA's Updata Link box missing parts

We fix our Updata Link Test box by solving the mystery of the missing analog components. We X-ray mysterious Motorola modules, fight with misbehaving LC circuits, and help 1960's circuits with a dose of 1970's technology. Ken's blog article about the X-ray reverse engineering of the Motorola modules: https://www.righto.com/2022/06/x-ray-... Eric's new book, see first chapter: https://nostarch.com/open-circuits Order on Amazon: https://www.amazon.com/Open-Circuits-... Apollo Comms Playlist:    • Apollo Comms Part 1: Opening the S-Band Tr...   Links to doc: https://www.curiousmarc.com/space/apo... https://virtualagc.github.io/virtuala... https://www.ibiblio.org/apollo/ Our sponsors PCBWay: fast turn PCBs, https://www.pcbway.com ElectroRent: https://www.electrorent.com Keysight: test instruments: https://www.keysight.com Samtec: connectors: https://www.samtec.com R&D Microwaves: https://www.rdmicrowaves.com/ Support the team on Patreon:   / curiousmarc   Buy shirts on Teespring: https://teespring.com/stores/curiousm... Learn more on the companion site: https://www.curiousmarc.com Contact info: https://www.youtube.com/curiousmarc/a... 00:00 Recap of previous work on the UDL 03:53 The PSK circuit is has some mystery modules, and missing others 07:45 X-raying the mystery modules 11:43 Figuring out the missing circuit 12:29 Experimenting with misbehaving inductors 17:58 We find the right coil to build our missing filters 19:27 Generating PSK with the new filters 20:27 Adding the missing oscillator 23:14 Final test