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I found an atomic clock at the world's largest vintage computer show

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Source: Jeff Geerling
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  • updated_at: 2026-10-04T01:00:00Z
  • description: I thought I had the best time. Then someone brought over a cesium atomic clock, and I wasn't sure. Segal's law: "A man with a watch knows what time it is. A man with two watches is never sure." Some of the things I mentioned in the video: - VCF Midwest: https://vcfmw.org - ShadyTel: https://shady.tel - Meinberg GPS Antenna: https://www.meinbergglobal.com/english/products/gps-antenna-converter.htm - Pumping Station One: https://pumpingstationone.org - Tattler Solutions WOPR rackmount display: https://tattlersolutions.com/wopr/ - Duchtronix AVR Scope Clock: http://www.dutchtronix.com/ScopeClockH3-1-Enhanced.htm - My TrueTime Pi configuration: https://www.jeffgeerling.com/blog/2026/truetime-xl-gps-time-server-restomod/ - MacMesh: https://macmesh.xyzzy.computer - Mr. Macintosh: https://www.youtube.com/c/MrMacintoshBlog - L2J video on the Prototype Apple Network Server 300: https://www.youtube.com/watch?v=tupEO0mrf0c - Quadra 800 MiSTer FPGA core: https://github.com/danifunker/MacQuadra800_MiSTer - PicoPCMCIA: https://www.yyzkevin.com/picopcmcia/ - PC110 Motherboard Recreation: https://github.com/ahmadexp/Open-Source-PC110 - dosdude1: https://www.youtube.com/@dosdude1 - Ron's Computer Videos (helped me get some clips!): https://www.youtube.com/@RonsCompVids - Retro Tech Foundation: https://www.retrotechfoundation.org - TAPR TICC: https://tapr.org/product/tapr-ticc/ Support me on Patreon: https://www.patreon.com/geerlingguy Sponsor me on GitHub: https://github.com/sponsors/geerlingguy Merch: https://www.redshirtjeff.com 2nd Channel: https://www.youtube.com/@GeerlingEngineering 3rd Channel: https://www.youtube.com/@Level2Jeff Contents: 00:00 - Something unexpected 01:02 - NTP Demo on a bunch of old Macs 04:49 - Other YouTubers 05:24 - Hard disk clock, atomic clock, and RF station 05:59 - Oscilloscope time 06:23 - WOPRs and MacMesh 06:59 - The rack of Mac Servers 07:20 - New hardware for old systems 07:50 - dosdude1 GSM cellular demo 08:13 - This place was HUGE 08:35 - Ingenuity in time transfer 09:23 - Comparing clocks 10:05 - Sharing the best time with everyone
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  • uploaded_at: 2026-09-18T14:00:14Z
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