I dont see a connection to the Z-axis (or did you use connections from the back-side of the case ?) so I'm surprised to see such a crisp text display. I was planning to turn my USM-117 into a scope-clock, but I found a decent kit online last year. Even though I have an HP digital scope, I still like bringing out this oldie for every now and then for bench work.
On Monday, March 7, 2022 at 5:43:46 AM UTC-8 Toby Thain wrote: > On 2022-03-07 8:23 a.m., 'John Rehwinkel' via neonixie-l wrote: > >> What's even more interesting is that a lot of these old dinosaurs > >> still work. A friend at work gave me a US Navy scope (USM-117) from > >> the early 1960's, and at first it was having some problems generating > >> high-enough anode voltage for the CRT, but letting it run a few hours > >> apparently coaxed the capacitors into working again. The other neat > >> thing about this scope is that the only vacuum tube is the CRT; > >> everything else is transistors which was quite a feat for 1963. > > > > I picked up this USM-117 at a hamfest for a few bucks in "you fix" > > state. It turned out to be pretty dirty and beat up, a few bad > > transistors, and the base had come off the CRT. I had never reattached > > a CRT base before, but I figured I had little to lose. I ended up > > curing the base cement in the kitchen oven. It worked, too! > > Beautiful! What are you using to generate this image? > > Thanks > --Toby > > > > > > - John > > > > > > -- > > You received this message because you are subscribed to the Google > > Groups "neonixie-l" group. > > To unsubscribe from this group and stop receiving emails from it, send > > an email to [email protected] > > <mailto:[email protected]>. > > To view this discussion on the web, visit > > > https://groups.google.com/d/msgid/neonixie-l/844D15B6-9483-4DAA-9EBC-DBDDE2F59523%40mac.com > > > < > https://groups.google.com/d/msgid/neonixie-l/844D15B6-9483-4DAA-9EBC-DBDDE2F59523%40mac.com?utm_medium=email&utm_source=footer > >. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/dea797fe-eb5e-4fd7-a26e-4509ed15e74en%40googlegroups.com.
