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ID = 29915
Great Britain (UK)
Brand: Mazda = Valve (Tube) brand GB (see also France)
Tube type:  Transmitting Triode, air cooled   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to ES60 = DA60 = DO60 = CV1206 = 660T = MZ05-60

Base L4 British large 4 pin (1922, LG4)
Was used by Transmittertube (Radio)
Filament Vf 6 Volts / If 4 Ampere / Direct / Parallel, (AC/DC)

Graphite Anode Power Amplifier for public address and modulator applications.
Pa <60W; Va <750; ì =3 Ra = 1.2k approx. Also branded Ediswan but made in same factory.

Dimensions (WHD)
incl. pins / tip
80 x 185 x mm / 3.15 x 7.28 x inch
Information source Universal Vade-Mecum, Electron Valves and Semiconductor Devices   group 349
- - Manufacturers Literature   
ES60: Fin Stewart
Fin Stewart

ES60: own collection
Peter den Boer

from Just Qvigstad

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