One inch cathode ray tube used in instruments, for example in wireless telegraphy.
Equivalent to DH3-91.
6.3V indirectly heated cathode.
Manufacturer: Cossor, England.
Cylindrical bulb with 8 pin locktal base with phosphor at one end. Mounted in detachable socket.
Donation from J. C. Liddy, 25/09/1967
Bulb: Cossor/1CP1/Serial No 722/Made in England/(BVA logo)
Type of item
100 mm (Length)