@KHoos@infosec.exchange Website looks like it hasn't been updated much lately (I see a 2019 modification date on the home page) but he's still alive and timenutting, I see a post on the mailing list from just a few days ago. Google seems to suggest he's in the Redmond/Bellevue area which is on the wrong side of the city but probably the closest I'm going to find a hydrogen maser to compare to. Sent him an email and we'll see what happens.