Uploaded December 2023 | Updated September 2026, 1 week ago

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We got a beautiful and complicated CDC TMG-303 Teletype Tester from a viewer. Which does not work and does not have any documentation. But that's not going to stop us, right?

Usagi Electric Channel: youtube.com/@UsagiElectric

Stuff that supports the channel:
- Amazon links for the tools I use in the lab (supports the channel if you buy from there)
curiousmarc.com/amazon-links
- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store
- Support us on Patreon: patreon.com/curiousmarc

"Elevator Music" Credit: Crinoline Dreams by Kevin MacLeod

Our lovely sponsors
- PCBWay: fast turn PCBs, pcbway.com
- Electro-Rent: electrorent.com
- Keysight: test instruments: keysight.com
- Samtec: connectors: samtec.com
- R&D Microwaves: rdmicrowaves.com

Get more technical info on the companion site: curiousmarc.com
Contact info: youtube.com/curiousmarc/about