home of the original Flemingvalve 100 Years of Electronics 2004 – The Centenary of the FlemingValve Life and Times of Ambrose Fleming (页面存档备份,存于互联网档案馆)
from rec.audio The invention of the thermionic valve. Fleming discovers the thermionic (or oscillation) valve, or 'diode'. Tubes Vs. Transistors (页面存档备份,存于互联网档案馆) :