ARDE by Ediswan 2 Volts Dull Emitter with original boxes

Description

These valves are over 100 years old! The ARDE was introduced by Ediswan in 1923 and its use was general purpose valve. The four valves you see here have no stripes around glass showing it was a AF or RF use.

ARDE is the acronym for Amateur Radio Dull Emitter.

You can see on carton it says “low temperature valve”.