IanScottJohnston - Electronics

*** PCBWAY For all your PCB Services at https://www.pcbway.com/?from=ianjohnston *** This 9900 Universal Counter Timer has a broken IC, not faulty......just broken! #electronicscreators Visit my website for lots more - https://www.ianjohnston.com Help me make more of these videos: Pledge using Patreon - https://www.patreon.com/IanSJohnston Donate using PayPal - https://www.paypal.me/IanSJohnston Follow me on Twitter - https://twitter.com/IanSJohnston

Repairing a Racal-Dana 9900, I had to check whether the Ferranti 22-4601 ceramic IC was made from Beryllium Oxide or not. BeO is a toxic and dangerous substance in dust form........and I was filing it down! I checked the tester using a real diamond and it worked, so tested the ceramic IC. Here's the repair in question, see the comments below the video for the discussion there also: https://youtu.be/s17EVfInMk0 BeO info: https://en.wikipedia.org/wiki/Beryllium_oxide #electronicscreators Visit my website for lots more - https://www.ianjohnston.com Help me make more of these videos: Pledge using Patreon - https://www.patreon.com/IanSJohnston Donate using PayPal - https://www.paypal.me/IanSJohnston Follow me on Twitter - https://twitter.com/IanSJohnston