Still nothing from the Aurora though!
I did briefly try rocking the signal genny around the 34-37.5Mhz area, with the following results: V4 pin 1 gave patterning on screen. V3 pin 1 gave plenty of sound, but not much on screen. Pin 5 weaker sound, but some noise on screen.
I will get back to the set later today, I think a good start would be to list the voltages on the valves.
Mark