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/8c6f5d9f-ce1b-470f-a2a3-5e34e7c8f6c4n%40googlegroups.com.
