David used to play Galaxia. Tempest was a bit "fast" for us.
On Thursday, October 30, 2025 at 4:29:01 AM UTC-7 Tom Katt wrote: > On Wednesday, October 29, 2025 at 9:04:16 PM UTC-4 Instrument Resources of > America wrote: > > Pilot Radio Company made a three inch black and white television in the > late 1940's early 1950's. It was the first television to break the $100.00 > price tag, on the low side. It's CRT IIRC was a 3RP4 with P4 phosphor. > These sets are highly prized by collectors, including myself. I have one > currently under restoration, with a good CRT. Unfortunately many of these > sets do NOT have good CRT's. and the folks who have them have resorted to > using the 3RP1's and this of course is adding to their shortage. Making > clocks with them is also adding to their shortage, along with the collector > crowd. > > Ira. > > Forgot to mention - I have a Waterman S11-A "Pocket Scope" in fantastic > working condition (including velvet lined storage carry case!) that dates > back to 1948/49... A compact 5 tube (+ 3MP1 crt) scope that is actually > quite versatile for the time period. Of course it's displaying a clock now > or my stereo audio signal depending on the day ;-) The manual is > interesting reading, especially the reference of how to test various > signals by observing lissajous curves. The same model can be seen here: > oscilloscope-waterman-s-11-a-s4843 > - Oscilloscope Museum > <https://www.oscilloscopemuseum.org/oscilloscope-waterman-s-11-a-s4843.html> > > And tech doesn't even have to be that old to become unobtanium - I've got > a Teensy 3.6 in a drawer that's been waiting for a project like this... I > went to buy another board and was shocked to discover my $30 purchase now > demands nearly $300 on eBay (when they are even listed). These boards are > only about 10 years old - but the controllers they are based on are > obsolete. > > Back on topic, I'm inclined to try the HV on the cathode end - this makes > the deflection drivers a bit easier to manage. I'm going to borrow heavily > from Mr. Forbe's optocoupler Z axis design to handle the high negative > voltages on the grid ;-) I picked up a 500VCT toroid tube power xfrmr from > Antek > <https://www.antekinc.com/power-transformers/>- they are very reasonably > priced and made in the US. I'd like to go with a CCFL type switch mode > power design, but my digital skills far outweigh my analog skills - but I > can manage a basic rectified power supply lol. > > Between the Teensy and an Arduino Due - I have some good experiments > planned for these crts. > > And I blame all this on Mr. Forbes lol - I was hooked when I saw that > first scope clock way back ;-) I thank you for sharing your knowledge. > Atari Tempest was my game back in the day, and would you believe that some > kid brought in an old Dumont scope for show and tell - *in kindergarten > !!! *That day is seared into my brain. > -- 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, visit https://groups.google.com/d/msgid/neonixie-l/aceff9e4-148d-4c47-8a1b-18f8e2fd0770n%40googlegroups.com.
