https://stream.echo6.co/videos/watch/c86c5b20-2564-4e2f-a14a-c096fa6a17c8 A look at one of the original HP 5061A Cesium Beam atomic clock frequency standards used in the "flying clocks" experiment in the 1960's, that showed (not definitely at the time) that time dilation as part of Einstein's relatively theory was correct. The effect was not confirmed until a more precise run in 1971, again with the same clocks. Forum Topic: http://www.eevblog.com/forum/blog/eevblog-423-hp5061a-atomic-clock-cesium-beam-frequency-standard EEVblog Main Web Site: http://www.eevblog.com EEVblog Amazon Store: http://astore.amazon.com/eevblogstore-20 Donations: http://www.eevblog.com/donations/ Projects: http://www.eevblog.com/projects/ Electronics Info Wiki: http://www.eevblog.com/wiki/ Wed, 10 Jun 2026 07:02:12 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://stream.echo6.co https://stream.echo6.co/client/assets/images/icons/icon-512x512.png https://stream.echo6.co/videos/watch/c86c5b20-2564-4e2f-a14a-c096fa6a17c8 All rights reserved, unless otherwise specified in the terms specified at https://stream.echo6.co/about and potential licenses granted by each content's rightholder.