Robert,
I have come across a lot of tubes with this issue (not the cut off leg). Although I have broken more than my share of tubes by dropping them, I have never broke a tube with a short. I have over the years been able to smack the short out of them. I believe you will find it is easier than you think it might be. Of course you will see dollar signs flash in front of you each time you smack it. Trying to look closely at your short, my suggestion would be to put the tube in a socket and smack the tube in a downward fashion on a table. The socket being used to protect the pins and the nipple. Also try smacking the face of the tube into your hand. Michail Wilson 206-920-6312 From: [email protected] [mailto:[email protected]] On Behalf Of Robert G. Schaffrath Sent: Saturday, October 12, 2019 10:17 AM To: neonixie-l Subject: Re: [neonixie-l] Re: I'm Back: ZM1022 and B-7971 It took some digging around to find it, but I did locate the Ultronics B-7971 with the shorted segments. This is a closeup picture of the short: B-7971 Shorted.jpg Then for some reason around 30 years ago, I decided to cut the #17 pin off which is connected to the #13 slanted segment that is shorted. Not sure why I did that or what I was thinking back then. If I can resurrect the tube, it would not be that big a problem to attach an extension to the remaining stub and make #13 usable again: B-7971 Cut Pin.jpg Finally, my 40 year old 6 tube clock in operation. I had not powered it up in a while. Still works! Mind boggling to think the tubes in this clock could be worth close to USD$900 now (It is covered in plastic due to the dust issues. I got tired of cleaning off the tubes when I wasn't even using it): B7971 Clock.jpg On Wednesday, October 9, 2019 at 11:29:18 AM UTC-4, Robert G. Schaffrath wrote: That link is not working but a search of the forum turned this thread up: https://groups.google.com/forum/#!searchin/neonixie-l/shorted$20segment|sort:date/neonixie-l/w4YmXnY9dgE/8o-AsZZyBQAJ <https://groups.google.com/forum/#!searchin/neonixie-l/shorted$20segment%7Csort:date/neonixie-l/w4YmXnY9dgE/8o-AsZZyBQAJ> I assume that is the thread you were referring to. I'll have to give it a try. If the tube breaks then so be it. About all it is good for is making either an "A" (8 with bottom off) or "P" for an AM/PM indicator. 20+ years ago or so I stupidly cut off the pin for the #13 segment because it was shorted but it could be repaired and used again. Especially considering the value of the tubes it would be a minor inconvenience. I'll have to dig the tube out this weekend and give the repair process a shot. On Tuesday, October 8, 2019 at 10:47:08 AM UTC-4, Jeff Walton wrote: Check out this thread for repairing the shorted segments: https://groups.google.com/forum/m/#!searchin/neonixie-l/Shorted$20segment$20b7971/neonixie-l/w4YmXnY9dgE Jeff -------- Original message -------- From: "Robert G. Schaffrath" <[email protected]> Date: 10/8/19 8:47 AM (GMT-06:00) To: neonixie-l <[email protected]> Subject: Re: [neonixie-l] Re: I'm Back: ZM1022 and B-7971 With me it is the only B-7971 tube I have like that. It came from the first Ultronics board I ever purchased in the late 1970's. It came from Poly Paks IIRC. It was actually a bad deal for me. Apparently the board had been serviced which explains the genuine Burroughs tube that was on the board. The other tube is Ultronics (which I still have) and is defective. The #4 and #13 segments touch each other causing both to light when either is energized. The circuit board had jumpers soldered onto it and handwritten in fine tipped magic marker it said "modified for dummy 0". My parents joked at my expense that it was modified for the dummy (me). Why the Ultronic service center did not replace the defective tube rather than go through the effort of modifying the board escapes me. Especially since they replaced what I assume had been an Ultronic tube in the other socket. I could have had two Burroughs tubes with posts. When I decided I wanted to get three more boards, I bought them from Meshna due to my bad experience with the other vendor. After I had those boards, I decided to splurge on the 6 NOS B-7971's. I still have one Ultronics board left that has the sockets still installed but no tubes. I used the other three for sockets and HV transistors to build my MM5311 clock. On Monday, October 7, 2019 at 7:48:07 PM UTC-4, Bill Notfaded wrote: They made less of the antenna variety from what I've seen. Most of mine don't have them. Bill I also have I believe a 1.06 version of that clock that runs off the mains. Mines running z566m red tubes. Bill -- 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/b92d4c7c-8299-4557-a833-f14623d4873e%40googlegroups.com <https://groups.google.com/d/msgid/neonixie-l/b92d4c7c-8299-4557-a833-f14623d4873e%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/336ab4e7-7ca5-438b-baa6-f1a9debb286d%40googlegroups.com <https://groups.google.com/d/msgid/neonixie-l/336ab4e7-7ca5-438b-baa6-f1a9debb286d%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/004f01d58125%24a5a71020%24f0f53060%24%40com.
