by:  Ian Du Rieu
 

March 22, 2005
A visit to The Ellison Museum of Magnetic Audio Recording and Playback Equipment.

May-16-2006
A comparison of old and new microphones.
by Ian DuRieu, Andrew Bayfield, with Simon Cousins, classical guitarist.

Aug-15-2006
Microphone Amplifier History and Design.
by Graeme J Cohen

Feb-20-2007
Vaughan Harvey, radio personality and enthusiastic microphone collector will trace the history of the broadcast microphone from the early 1920's, the beginning of broadcasting to the present day using examples  from his own collection.
The link currently contains a few notes about a resurected 1920s microphone to be "fired up in anger" on the evening.

Sept-25-2012
Audio Power Amplifiers :- History and design of the audio amplifier.
by Graeme J Cohen

June-17-2014
Are Stereo Headphones really Stereo?
by Graeme J Cohen