> On a related note, are there any recommendations for a CRT that is known to > be reliable and not easily burned from long-term usage ? > That would influence my choice for a scope-clock kit.
The 3RP1 and its flat-face variant 3RP1A are popular choices, they're common and durable (they may even still be produced, in China). The 2AP1 is cheap and common. There are several likely 5" tubes out there, including some with variant phosphors that may give longer life. There are a lot of old Tektronix oscilloscope tubes out there on eBay, they're very well made and durable, but many of them want high PDA voltages (I think Grahame's design can support them, but I'm not sure of the limits). Some of the early Tektronix CRTs (which will generally be a good bet for a scope clock) also have RETMA designations, like the 5ABPx (available in the generic P1, the P7 yellow/blue cascade phosphor, and the P11 blue photographic phosphor). Possibly useful list here: http://w140.com/tekwiki/wiki/Cathode-ray_tube > I have yet to fire-up one of my 3L01I tubes, and so far I've seen mixed > reviews on it's phosphor life. It has a very thin phosphor layer, and life isn't good. The 6LO1I might be a better choice, it's another Russian tube that has a larger, rectangular face, and probably better lifetime. It's also fairly common and affordable. > Maybe it's penance for all those CRTs I enjoyed smashing years ago........ We all did some dumb things in our earlier days. - 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]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/22D21765-F09C-4226-AA9F-34949B7A1703%40mac.com. For more options, visit https://groups.google.com/d/optout.
