AC042 Mullard 2P PA20 gold top long semi coated envelope ribbed plate full getter pair audio valves

Description

The Mullard AC042 is a low impedance triode

Introduced in 1937 the AC042 is capable of giving 3.5 watts hence suotable for sensitive speakers

Nice pair of semi-coated Mullard AC042 with gold top and AC042 encircled.

The filament works at 2 Volts

Anode 300 Volts

Anode dissipation 50mA

Grid -38

mA/V 5

Both valves AC042 tested mint at 48mA and 49mA 100% emission.