BVWS Bulletin Volume 20, Number 1 (February 1995)

BVWS BulletinVolume 20, Number 1 (February 1995)

Front cover:  A circa 1945 Ekco A22 in walnut bakelte with bronze trim.
Back cover:  Gecophone advert from May 1923

Page Title Summary/Notes
4 Valves: What They Do And How They Do It.
Pat Leggatt
An introduction to thermionic emission and the diode.
6 The Classics: The Double Decca.
Geoffrey Dixon-Nuttall
A review of the notorious mains-battery portable of 1939.
8 Why Did Hertz Demonstrate Waves in 1888
Local Oscillator
A review of the work of Heinrich Hertz and James Clerk Maxwell
10 The Philips V7 Revisited.
Geoffrey Dixon-Nuttall
Revisiting the design of the Philips V7, a bakelite radio with no chassis.
13 Automatic Volume Control.
Dull Emitter
The need for, and implementation of, AVC.