That is really great! On Tuesday, September 1, 2015 at 9:55:38 PM UTC-4, J Forbes wrote: > > I made this clock around 2002, and made the video around 2008. > > https://www.youtube.com/watch?v=VM9TW6GcCQE > > http://selectric.org/tubeclock/index.html > > I probably need to update the web page! But anyways, the clock quit > working not long after I made the video, and has just sat doing nothing. > For some reason I brought it out into the light a couple days ago, and > started messing with it. The counting was not working, it would sometimes > show movement, other times just sit stuck. I poked and prodded and noticed > it would sometimes start working for a little while if I wiggled one of the > four tubes in the input circuit (which turns the sine wave of the line > voltage into a 60 Hz pulse). I realized I could try substituting tubes, and > see if it would make a difference. The third one I tried, did the trick. > The 6U8A seemed to want to be replaced, it started counting just fine. > > Then I decided to see if I could fix the setting issue. When I was working > on the clock originally, I decided to make it into a tall obelisk case, but > never got around to actually building the case. To make it fit, I extended > the wires from the main unit to the Hour/Minute display unit, and it has > always been finicky about setting time since I did that. I decided that > maybe it could fit in a smaller case now, so I shortened the wires, and now > it works great. I can set the time easily. > > It's been running for a day and a half, keeping good time. But it sure > does get warm, with 31 vacuum tubes! > > Anyways, hope all of you are doing well, and enjoy my little blast from > the past > > Jim > >
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