Antique radios, Old Time Radios
ES250M
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Country:
Great Britain (UK)
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Brand:
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| Tube type: |
Transmitting Triode, air cooled Power/Output |
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| Identical to |
ES250M
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| Base |
Pin-and-blade jumbo (3 contacts)
Top contact with a cap.
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 11 Volts / If 4 Ampere / Direct / Specified voltage AC/DC |
| Description |
Primarily designed as an audio amplifier where single tube can supply 30W. Ande dissipation <250W with Va <2000.
Can also be used for RF up to 20MHz, where anode dissipation should be <200W. Tubes suitable for the higher frequencies were supplied on special request.
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Dimensions (WHD)
incl. pins / tip |
110 x 365 x mm / 4.33 x 14.37 x inch |
| Information source |
Universal Vade-Mecum, Electron Valves and Semiconductor Devices group 390, p. 880 & 881
- - Manufacturers Literature August 1948, Feb.1942 and 1937
Babani, International Radio Tube Encyclopaedia
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ES250M: Fin Stewart
Fin Stewart
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Just Qvigstad
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ES250M: own collection
Peter den Boer
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