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