VERY EARLY TUBES
|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
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 Like all early Marconi tubes, it was originally made by Edison Swan but after 1919 by M-OV.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 (Ebay photo)|
|MARCONI MORSE KEYS|
|365EZ Short base|
|365EZ Long base|
Contributors and Credits:
4) V24 and 'Q' photos by Ben <benam(at)rogers.com>