Antique radios, Old Time Radios
VT15_GPO
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Country:
Great Britain (UK)
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| Identical to |
VT15_GPO
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| Similar
Tubes |
Other base and data slightly different:
8RR4
; AT40
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| Base |
SPECIAL TUBEBASE in general
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| Was used by |
Telephony |
| Filament |
Direct / Specified voltage AC/DC |
| Description |
Tube designed for use by the British Post Office in carrier telephony applications. First made in 1921 with limited production of only 50 tubes.
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| Information source |
British Radio Valves - The Vintage Years: 1904-1925 Pages 83 and 133
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[rmxtube-en]
| Data Compliance |
More Information |
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