Miscellaneous: MULLARD U30 RECTIFIER VALVE, 1920's
MULLARD U30 RECTIFIER VALVE, 1920's
Early Rectifier valve made by Mullard Valves in the early 1920's.
Maker known then as the Mullard Wireless Service Company Ltd
©2007 The Museum of Technology, The Great War and WWII
Company registered in England No. 7452160, Registered Charity No.
1140352, Accredited Museum No. 2221