When I was in school, late 70's-early 80's, I was working as a tech. One time they had me build a universal counter, around an Intersil chip. It worked upto 10MHz, but sadly had a LED display. They wanted to go upto 100MHz, and I did add an ECL chip. It initially was run of a cheap 10MHz xtal osc. The boss later modified it, and added an oven enclosed oscillator, and then calibrated it using a LORAN receiver, to 1ppm. Engineers ... never satisfied ... always have to keep tinkering ...
On Wednesday, June 26, 2013 6:33:24 AM UTC-7, GastonP wrote: > > While we are at it... what made those instruments really interesting were > the (in)famous prescalers. Usually ECL technology dividers by 10. In those > years 5V technology (TTL, and later Schottky TTL) didn't fit the bill for > 100 MHz counting... > Sad to say that there were very few of those instruments around here so > the opportunities to lay hands on a surplus one are nil to me. > However I used one in my university days. From there I remember the > nixies, and prior to that, from a huge calculator a friend of my uncle > bought for his shoe factory accounting people. > > On Wednesday, June 26, 2013 2:29:49 AM UTC-3, threeneurons wrote: >> >> Clearly a nixie fan. That document is about a freq counter app, using an >> AVR uC. The nixie counter photo, is pure window dressing that has minimal >> relationship with the document. Old counters, like the one in the picture, >> did the logic control using discrete chips, hardwired into state >> sequencers. I bet he owns at least one nixie clock. Probably built it >> himself, and designed it, too. If he used an AVR chip, he could possibly >> have entered in his time sheet, and got paid for it. >> >> On Tuesday, June 25, 2013 7:03:04 PM UTC-7, GastonP wrote: >>> >>> Nice catch, Nick >>> >>> The real fun is that there is no reference at all to that figure >>> 1-1... either the writer is a nixie-fan or he got very distracted at the >>> time of editing the article... >>> >>> Gaston >>> >>> On Monday, June 24, 2013 1:39:12 PM UTC-3, Nick wrote: >>>> >>>> Just saw this: >>>> >>>> http://www.atmel.com/Images/doc8365.pdf >>>> >>>> Bit of fun! >>>> >>>> Nick >>>> >>> -- 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 post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/fa59e6f2-06d5-41b9-b291-26af9ba0515f%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
