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.
Many of our beloved nixies and CRTs are approaching, and even exceeding, 60 years old and I am in awe of the fact the vacuum seals apparently are still holding. On Tuesday, February 22, 2022 at 11:38:28 AM UTC-8 [email protected] wrote: > When RCA was in its heyday, they promoted their "RCA Institutes” > correspondence courses in electronics. As part of the course in > > TV/radio servicing, the students had to assemble their own test gear. This > was one of those items. It is actually a rebranded Eico > > model 430 oscilloscope from the late ‘60s. I know this since I have the > model 435 which appears similar but has better bandwidth. > > I have always liked the looks of this series of test equipment that Eico > made during this period compared to their earlier designs. > > They are simple to use and relatively easy to fix since they don’t have > sophisticated features like triggered/delayed sweep. It looks > > like you’ve scored a nice one. Good luck and enjoy! > > Rich > > > > > On Feb 22, 2022, at 9:45 AM, martin martin <[email protected]> wrote: > > Since we are on the subject of CRTs... I was asked to pickup all kinds of > vintage items from an "Estate Giveaway" > > Here's the first one! More on the way, Heathkit VTVMs too.. > > > > -- > 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/586a03e4-6f55-4216-a715-6fc80e515c7en%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/586a03e4-6f55-4216-a715-6fc80e515c7en%40googlegroups.com?utm_medium=email&utm_source=footer> > . > <RCA.jpg> > > > -- 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/68e8a621-26c3-4e30-b890-d5ac27d24cbcn%40googlegroups.com.
