[TrevorG3VLF]

I mostly use an analog meter. This has a battery inside to measure resistance. This will give a click when connected across the speaker or transformer primary. Use the lowest range to get the most current.

If you do not have an analog meter then use a single cell or battery with a wire brushed over the battery terminal. A scratchy sound when the speaker isenergised shows the peaker is probably OK. If no sound is produced when the transformer primary is energised, then the transformer is faulty.

I always measure DC voltages early on to find serious faults. You could do this if you connected a 1k 2W resistance in place of the transformer primary.

As said before, do not run the set with no anode current, the current all goes to the screen which will object.