Antique radios, Old Time Radios
VT20_GPO
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| Tube type: |
High-vacuum Rectifier Text |
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<1925 very rare. *** |
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| Identical to |
VT20_GPO
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| Was used by |
Telephony |
| Filament |
Direct |
| Description |
High power rectifier tube used by the British Post Office in radio transmitting applications. Further details unknown
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| Information source |
British Radio Valves - The Vintage Years: 1904-1925 Pages 83 and 133
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