Stepper relays are likely to be a problem. The first clock I made, back in 1980, was a cannibalized voltmeter that used stepper relays and incandescent edge-lit numbers. The relays had intermittent connection issues despite many careful attempts to clean them. I literally abandoned this clock in 2005 when I moved to a different worksite.
Most likely you will need to clean the contacts, coat them with a conducive grease, and take steps to prevent dust/dirt from collecting on the grease. TV tuners (remember those ?) were notorious for having the same problem. On Wednesday, April 21, 2021 at 9:19:24 AM UTC-7 Dekatron42 wrote: > Thank you so very much this document, it will be a great help to get it up > and running properly! > > I might even do a complete circuit diagram now that I know how most parts > are hooked up from the article. > > I'll start by checking all of the electrolytics before I dare to power it > up, all of those big black canisters are the electrolytic ones. What I > first thought was a crystal in its crystal oven turns out to be the dual > zener diodes in the oven. > > /Martin > > On Wednesday, 21 April 2021 at 17:57:28 UTC+2 petehand wrote: > >> I can offer you this, from a 1963 Electronics World magazine. It's not a >> complete manual or diagram but it does explain the principles. >> >> You're a lucky guy. I greatly covet one of these. >> >> On Tuesday, April 20, 2021 at 5:31:42 PM UTC-7 Dekatron42 wrote: >> >>> I've been Googling and asking everyone who has turned up for information >>> about a circuit diagram for my recent purchase of a Non-Linear Systems >>> Digital Voltmeter model 64 (stevenjohnson.com and nonlinearsystems.com) >>> without getting a response from anyone so I thought I would ask here if >>> anyone has any circuit diagrams for this model or other similar models. >>> >>> It is almost like the Model 481 that seems to be quite common, but it >>> does only have four of the selector switches so there is no automatic >>> polarity indication but a switch on the front to change the plus/minus sign >>> in the display. >>> >>> One of the digits is not lighting up at all even though that selector >>> switch is working, otherwise I was told it should work perfectly as the >>> other digits should show the correct measurement. I haven't powered it up >>> myself, the previous owner did, and I'd like to repair it. It wouldn't be >>> complicated to reverse engineer it but getting hold of proper documentation >>> would be very welcome. >>> >>> /Martin >>> >> -- 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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/a1eeaa58-8a06-454f-b522-d4ed5d0ba8c1n%40googlegroups.com.
