NHRA21 wrote: The only big difference I noticed was that there was a 18k resistor on each of the Anodes.
I take it your old board was a direct drive design? That would explain the different resistors. Classic Rev. 6 is a multiplexed design, meaning that each tube is only lit 1/6 of the time. The resistors need to be much lower value in order to get the correct perceived brightness. I wouldn't expect this to make any difference in cathode poisoning one way or the other.
ACP is one of those things where opinions are varied. If it was my clock I'd leave ACP turned on. But if it really bothers you to see the tubes "ACP cycling" then turn it off. I'd say 10 years of smooth operation without ACP pretty well show that this particular model of tube is very resistant to poisoning.
Look into it later when the dust is clearing off the crater.
I'm interested in this too, Ty. I'd like to change the option in the wifi menu to turn off ACP completely, instead of just when the clock is dimmed.
Maybe you know of a simple thing to change in the clock code.