Hmm, maybe you should send some of those spares to me for safe keeping then, in case of natural disaster there...
On Tue, Jan 26, 2021 at 10:48 AM [email protected] <[email protected]> wrote: > On Monday, January 25, 2021 at 9:30:49 PM UTC-8 gregebert wrote: > >> Interesting notes from the seller, mentions slight ghosting. The >> clock-chip does the multiplexing, though it was probably intended for LEDs >> which dont have requirements for blanking time. > > The chip is a National Semiconductors MM5314. I have a Panaplex > evaluation kit that used this chip, and I do not remember seeing any > ghosting (and the Panaplex and B7971 were both made by Burroughs). > > My B7971 clocks used the Cal-Tex CT7001 which multiplexes with 120µs ON > followed by 40µs OFF. You can see ghosting, even on some of the segments > that were not wired (floating). Must be due to some parasitic capacitance > somewhere. > > > >> Downright scary how much the 7971's are selling for... >> > I still have a bunch of spares (none of my 7971's died of natural causes, > so I have lots). I am rooting for the price to go up to help fund my > retirement. > > -- > 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/04fbff29-dca0-477e-9c8b-4abfdd53bb5bn%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/04fbff29-dca0-477e-9c8b-4abfdd53bb5bn%40googlegroups.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/CAJD4P-ie8p68B03aFZjZJ8RHXYEpHVN_1JWZ%2BOrgssM3GL%3DuNA%40mail.gmail.com.
