3A/108A CV1653 by STC and Mullard 904V AC2/HL equiv. and 994V balloon btriodes

Description

The STC 3A/108A was a telephone repeater triode but used today in audio application. We offer a pair MINT New Old Stock and on the same picture you see a pair of golden globe Mullard 904V and 994V.

The 904V is an AC2/HL equivalent whilst the 994V is an indirectly heated audio triode.