Miscellaneous

 
 

VERY EARLY TUBES

v24_and_qtube.jpg
The 'Q' and 'V24' we just two of the earliest tubes which found their way into the first vacuum tube radio designs. (Photos by:  Ben  benam(at)rogers.com)

Introduced in 1916, the 'Q' tube is a  triode with widely positioned leads to minimize inter-electrode capacitance. It was a high impedance tube, used primarily as a detector. Like all early Marconi tubes, it was originally made by Edison Swan  but after 1919 by M-OV.

The V24 was a directly heated triode. It was  a development of the 'R' type aimed at improving high frequency performance. Type V24 was introduced in 1916 and was used as an RF amplifier. Filament needs 3 volts at 0.7 Amps with an anode voltage of 24 volts, hence the name V24. 

/r valve.jpg
R Valve (Ebay photo)

 
MARCONI MORSE KEYS
100A
213
365B
365EZ Short base
365EZ Long base

 
 
 
 


Contributors and Credits:
 

1) http://www.oneillselectronicmuseum.com/largephotos/decorphoto/marconiad1a.jpg
2) http://www.g3ngd.talktalk.net/marconi.html
3) http://www.r-type.org/articles/art-002.htm#03
4) V24 and 'Q' photos by Ben <benam(at)rogers.com>
 
 

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Nov 15/12