This exhibit is a battery Class B audio power amplifier based on the Cossor 220B. The pre-CV RAF designation is VR32. It became the CV1032. The UK Army designation was AR16.
The crown and AM for the UK Air Ministry.
The top of the valve showing the two triode sections.
The classic envelope is 44 mm in diameter and, excluding the B7 base pins, is 93 mm tall.
