Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 19703
Great Britain (UK)
Brand: Osram-Valves GB (not MO-Valves)
Developer: Marconi's Wireless Telegraph Co. Ltd. 
Tube type:  Transmitting Triode, air cooled 
Identical to MT7B
First year 1922 ?? -- Collector info (Sammler)

Base Wires Wires only.
Was used by Transmittertube (Radio)
Filament Vf 15 Volts / If 10 Ampere / Direct

Anode volts 10 kv. This tube which was made with wire leads. Special adaptors were also available with this tube for the wires to be connected to screw terminals. The photo shows these adaptors.
Pd: 1000 W, Gain: 40, Ri: 30'000

Dimensions (WHD)
incl. pins / tip
180 x 450 x mm / 7.09 x 17.72 x inch
Information source The Saga of Marconi Osram Valve   Page 124
- - Data from my own collection   

Collection of



You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]