That's great! I remember seeing a picture or video that display - or one very much like it.
I bought most of my B-7971 tubes between 2002 and maybe 2005, and I think I paid $20-$30 each. A seller who seemed to have a LOT of them, would put them into the shipping box in their original styrofoam packaging, which had been broken broken up into sections, and then add random broken styrofoam pieces as filler. It was sloppy and lazy, and you could hear things moving around inside of the box. They didn't seem to care because there were plenty of tubes to go around. I received one broken tube, and they replaced it, but I think I had to pay the additional shipping cost. I think that's about the time I started following this list. It was when Ray was running it. BTW, I actually received my Geekklock kit from him, but I never got the "Accessory Module". Many people got nothing. His design seemed to be pretty good, and the kit was very nicely done. It must have turned into a pyramid scheme where he was paying the old debts with money from current sales, so eventually there was no capitol to buy parts, and it finally imploded. The situation was very sad. Several years ago, I started simplifying my life a bit, and I sold some spare tubes that had been gathering dust for years. Then, my MOD 6 clock was involved in a remodeling accident (covered here when I was looking for some replacement tubes). Fortunately, I was able to replace them for just a bit more than my selling price because members of this list took pity on my poor clock! Jim On Saturday, May 25, 2024 at 6:27:48 PM UTC-6 gregebert wrote: > How much were 7971's selling-for back in 2001, or whenever you got them ? > Today I see them around 200 USD; I paid 80 USD back in 2017 when I built > my 8-tube clock. > Long ago, as in the 1970's, I think PolyPaks was selling surplus 2-tube > modules for 8 USD. > > On Saturday, May 25, 2024 at 11:01:41 AM UTC-7 Leroy Jones wrote: > >> Here's another. >> >> On Saturday, May 25, 2024 at 2:00:00 PM UTC-4 Leroy Jones wrote: >> >>> Built this in 2001. Each tube has its own driver card. Each card >>> contains (2) 74LS273 8-bit latches. MPSA42 transistors switch each >>> segment via 30k anode resistors. >>> 74LS273 outputs operate transistor base via 100k resistor. 15 of 16 >>> bits used for tube. >>> There is one extra unused bit. >>> >> -- 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/8004068d-0b4a-49b6-a208-07d1bf305f66n%40googlegroups.com.
