What Is That? 8-16-7 What Is That? Add comments Aug 162007 If you’re a really old school geek, and I mean OLD…then you will get this instantly. Holler in the comments if you have a guess. 3 Responses to “What Is That? 8-16-7” TheSHAD0W says: August 16, 2007 at 4:59 am Vacuum tubes. John says: August 16, 2007 at 5:55 am Ah, fixing the TV. Use to see these at Walgreens along with the TV Tube tester machine. Andy says: August 16, 2007 at 8:35 am Yes, well done to both of you. Ah, the good ole’ days. I remember them fondly when working on a 30 year old nuke sub when i was young and stupid. I had to troubleshoot and repair the boat’s radar more than a few times, often the problem was a bad tube. A lot of times the troubleshooting was very easy, rack out the assembly while it was energized and find the tube that was dark. Leave a Reply Cancel reply Name (required) E-mail (required) URI Your Comment You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong> Anti-spam word: (Required)* To prove you're a person (not a spam script), type the security word shown in the picture. Click on the picture to hear an audio file of the word.