[Nuvistor]

V1a/V2a anodes are high, this could be due to the meter you are using, a digital meter tend to give higher readings in circuits with high value resistors.

The cathode voltages are interesting, the pentode cathodes are low, cathode resistors or cathode bypass capcitors could be faulty.
You havent taken the screen grid G2 voltages pin 3 on both valves. If the G2 voltages are accepable and the cathode components are Ok then it points to low emmision ECL86 valves which will be ashame, they are expensive.

The cathode voltages on v2a is also incorrect, check the cathode components in that section, again it could be faulty ECL86.

Before sourcing valves check the components metioned and also may as well check the ones that Michael in post 15 if you have not already checked them.

Valve seem to be about £50 for a pair.