Select this link for a UK (CV series valves ) cross reference to  JAN series valves.

DE6 valve. (History of Science Museum of London photo)

DEB6 valve. (History of Science Museum of London photo)

This example of an early Fleming valve is held in the collection of the History of Science Museum in Oxford UK.. The name Fleming is clearly printed on the glass envelope. The printing on the bulb says; " Fleming Oscillation Valve", and " Ediswan". Fleming never licensed anyone but Marconi to use these valves until after 1919. (Photo via Getty Images)

This is a later Fleming valve and socket, one of the exhibits at the AWA Museum.  This valve was the first mass produced electronic valve.  (Photo by Lewis Bodkin)

Taken in October 1917, this was the Receiving Room of the Marconi station at Glace Bay, Cape Breton Nova Scotia.. One can see a row of early Fleming valves sitting on the window sill.  With so many valves it is suspected they are spares. Click on image to enlarge,

LS-2 valve with original box and horsehair padding. Does anyone have specs on this tube? Contact : jerry.proc@sympatico.ca (Image via E-bay)

R valve. (History of Science Museum of London photo)

R type valves made by OSRAM were packaged in boxes like this. (E-bay photo)

R valve variants

A table of tubes. From  "Saga of the Vacuum Tube". Download image to enlarge. .(Provided by Lewis Bodkin)

Envelope profile for just two of the types. From  "Saga of the Vacuum Tube". Download image to enlarge. (Provided by Lewis Bodkin)

VMS-4 valve. (Image via E-bay)

 

Contributors and Credits:

1) ) Lewis Bodkin  <05bodkin555(at)gmail.com>
2)  "Saga of the Vacuum Tube"

Nov 25/23