Testing and resistor values...

Did more work on the nixie clock project. I did a bunch of testing with the series dropping resistor. Its just getting too hot. I may have to change the transformer.
I tested the nixies and found one bad one. I replaced it and tested different values for the anode resistor with my resistor substitution box. Between 10 and 20K seems to be good.
Then I wired half of the 74hc595 shift registers.
Still a bit more wiring to go...