[Arran]

The blob of silicone is obviously not correct but the 42-327 I have had a 120 volt candelabra type pilot lamp, basically a Christmas tree/nightlight type bulb. I think that metal reflector hooked into the inside top of the cabinet, I but can't remember. The reason they used those is because the 35Z3 rectifier tube does not have a pilot light tap on the heater, and whilst some sets used a power resistor in series with the tube heaters, and in parallel with the lamp socket to power a 6.3 volt pilot lamp, these did not, my guess is because the set has an extra IF amplifier tube. In the end it comes down to parts count I guess. That being said you could use an LED substitute to cut down on the heat somewhat, but then again how often are you going to use the set?
Regards
Arran