BVWS Bulletin Volume 1, Number 3 (December 1976)

BVWS BulletinVolume 1, Number 3 (December 1976)

Front cover:  The magnetic detector used for transatlantic signalling.

Page Title Summary/Notes
2 Marconi Magnetic Detector.
A. R. Constable
Principles and operation of a magnetic detector.
4 The 'R' Valve.
Philip Beckley
Description of an early hard vacuum valve.
6 The Horophone.
Jon Hill
A wall mounted time signal crystal receiver.
7 G.P.O. Registration Numbers. An initial list of identified GPO registration numbers.
10 A Braille Crystal Set.
Jon Hill
The British Wireless for the Blind Fund.
13 The Marconiphone Valve-Crystal Receiver.
One of the first sets available to the public when the B.B.C. Began broadcasting in 1922.