[RodB]

I would start with measuring pin 5 of the 12AU6. It should be around 100 volts. FM front end circuits of this era are very sensitive to plate voltage problems. Since the power supply is driven by a selenium rectifier there may be a problem with it. I always replace a selenium rectifier with a modern silicon diode (1N4007). L2 is in the FM oscillator so you can check all solder connections associated with those parts. I assume you have the antenna connected to pins 2 and 3 of the antenna terminal block.