Antique radios, Old Time Radios
297A
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Country:
United States of America (USA)
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| Identical to |
297A
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| Base |
UV-Base (4 Pins+Bayonet, USA 1914 WE)
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| Filament |
Vf 1.75 Volts / If 0.35 Ampere / Direct |
| Description |
Argon triode Thyratron. 250 V PIV, 10 mA average anode current, 60 mA peak.
Initially used in the test protection circuit of the 1A Thermostat, BTL test circuits, and No.&5 crossbar telephone circuits. Production in 1978 was 915. Manufacture discounted 1987.
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| Information source |
Tube Lore (I)
- - Manufacturers Literature
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Just Qvigstad
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Collection of
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