BVWS Bulletin Volume 6, Number 2 (September 1981)
Front cover: A 1926 Ducretet five valve superhet.
|18||A 1920's Superhet – French Style.
Ian E. Higginbottom
|The Ducretet 5 valve 'supermodula' receiver, an early example of a self-oscillating mixer circuit.Includes schematic.|
|21||Sullivan Wavemeter No.54.
A. R. Constable
|Schematic and description of a circa World War 1 wavemeter.|
|24||The Ekco SW86 Receiver.
|An export model for the New Zealand market.|
|28||Walters Valve/Crystal Receiver, 1923.
D. P. Leggatt
|The “Wemco” No.1 set manufactured by Walters Electrical Manufacturing Co. Ltd. In 1923.|