Hivac triode valve

Made:
1930s in England
maker:
Hivac Limited

Hivac triode valve, Miniature triode for hearing aid

Details

Category:
Radio Communication
Object Number:
Y1984.48.109.1
Materials:
glass and metal (unknown)
Measurements:
overall: 63 mm 17 mm,
type:
triode valve
credit:
Gift of Dr. G. R. Airth