Antique radios, Old Time Radios
21A1
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Country:
Great Britain (UK)
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| Identical to |
21A1
= CV2253
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| Base |
Octal (Int.Octal, IO) K8A, USA 1935
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| Was used by |
Industrial |
| Filament |
Vf 6.3 Volts / If 0.95 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Tetrode tubefor Use as a half wave Grid Controlled Rectifier at altitudes up to 50,000 feet. It is xenon filled.
Va <1300 PIV; Ik <250ma mean. Vg1, Vg2 <-100V.
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Dimensions (WHD)
incl. pins / tip |
x 85 x 35 mm / x 3.35 x 1.38 inch |
| Information source |
- - Manufacturers Literature STC and Ediswan (January 1959 catalog).
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Just Qvigstad
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21A1: original data sheet
Bernd Staginnus
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