I soldered up a stock PNP-NPN transistor tree for the anode control, and surprise, it worked first go. This was reassuring as it is the first time the ts7260 has been hooked up to the high voltage.
The next step is to replicate that a further three times, and then wire up the nixies. Board layout is the toughest part of this project, I am geometrically weak.
Mid-afternoon snorkel off the southern boat ramp at Long Bay. Beautiful day for it, being so damn hot. The water was cloudy but warm enough. I spotted about six squid (so Rob tells me) in a row, going nowhere.