My first (8) came from PolyPaks or Burnstein-Applebee in 1971. They shipped mounted in the board assembly and were wrapped up in paper. I think that they were something like $8 for the set of two tubes. That was the good old days, but alas, I only bought the boards with eight tubes. My roommate an I were doing a senior college project for our EE classes. My roommate finished his clock but I switched from the 7971s to NL-840s (CK8754) so that I could use a BCD to Decimal driver with 74141 chips. I was lazy and didn’t want to create the font and driver circuit since there wasn’t a high voltage chip that could do the 15 segment output directly. I was jealous of his clock for all of these years. My tubes just sat in a box over the years of several house moves. Fast forward to 2014 and now live happily in a MOD-SIX. 7 of the 8 tubes original survived with one tube that cracked due to the many moves over the years.
Jeff From: neonixie-l@googlegroups.com On Behalf Of gregebert Sent: Thursday, December 3, 2020 3:46 PM To: neonixie-l <neonixie-l@googlegroups.com> Subject: Re: [neonixie-l] Re: B7971 Did anyone in this forum get their 7971's from PolyPaks a long time ago (1970s/1980s) ? I recall they were inexpensive, and many were sold in pairs along with the socket/driver board after being scrapped from Lectrascan units. Just curious how some of you acquired a large stash. On Thursday, December 3, 2020 at 11:15:03 AM UTC-8 Pramanicin wrote: They're currently going for anywhere from 160 to 200 dollars on eBay. Pictures of them being tested will help. Too rich for my blood at the moment, but I have enough of them already.... :) Best of luck selling them! Cheers Nick Sent from my iPhone On Dec 3, 2020, at 10:32, Wo Tu <wtu...@gmail.com <mailto:wtu...@gmail.com> > wrote: I‘ve built 2 clocks using B7971. But now I dont have space for more. gregebert schrieb am Donnerstag, 3. Dezember 2020 um 19:26:41 UTC+1: If you dont already have a clock or other device with 7971's, I suggest you make one. Even though these tubes are a bit ugly, they are so enormous and versatile that you will be pleased with it. And keep a few spares. I built an 8-tube clock with 7971's a few years ago and I still like it, and wish I had time to add more features via software (it's RasPi based, so I'm limited only by time and creativity). If you decide to sell, I've seen a lot of these being sold on Ebay for well over 100 USD, especially if you can show they are tested. You probably already have several messages from other neonixie members who want to buy some. On Thursday, December 3, 2020 at 10:11:26 AM UTC-8 Wo Tu wrote: I sorted out my collection of tubes and was surprised , how much B7971 I own. Would like to sell some of these tubes. What do you think is a fair price for one tube , or for six tubes ? -- 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+...@googlegroups.com <mailto:neonixie-l+...@googlegroups.com> . To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/231b9139-ea65-42d7-849c-e0041145d9can%40googlegroups.com <https://groups.google.com/d/msgid/neonixie-l/231b9139-ea65-42d7-849c-e0041145d9can%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 neonixie-l+unsubscr...@googlegroups.com <mailto:neonixie-l+unsubscr...@googlegroups.com> . To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/3d5f2377-c101-48fd-a416-d26fb6cebeb6n%40googlegroups.com <https://groups.google.com/d/msgid/neonixie-l/3d5f2377-c101-48fd-a416-d26fb6cebeb6n%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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/009901d6c9c5%2469db2c40%243d9184c0%24%40gmail.com.
