Assertion: tube's number | /r/CapableOf | light the valve
Facets:
value: from the 6.3v heater supply
type: OTHER
value: via a 220 ohm resistor
type: OTHER
Source sentences:
text: There was also a sub-miniature version with wire ends (Mullard DM70/DM71, Mazda 1M1/1M3, GEC/Marconi Y25) intended for battery operation, used in one Ever Ready AM/FM battery receiver with push-pull output, as well as a small number of AM/FM mains receivers, which lit the valve from the 6.3V heater supply via a 220 ohm resistor or from the audio output valve's cathode bias.