Antique radios, Old Time Radios
D3a
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Country:
Europe
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| Identical to |
D3a
= 7721
|
| Similar
Tubes |
Other characteristic (electr. data):
7722
; E280F
|
| Base |
Noval, 9 pin miniature (USA pico-9) B9A
|
| Was used by |
Telephony |
| Filament |
Vf 6.3 Volts / If 0.315 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Designed for a life of >10,000 hours in rf broadband telecommunications equipment.
Capable of maintaining characteristics even under cut-off conditions. (GEC/MOV data 1964)
Text in other
languages (may
differ)
|
Dimensions (WHD)
incl. pins / tip |
22 x 62 x mm / 0.87 x 2.44 x inch |
| Weight |
16 g / 0.56 oz |
| Tube prices |
7 Tube prices (visible for members
only)
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| Information source |
- - Manufacturers Literature
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D3a: P.ST
Peter Steffen
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D3a: Telefunken, Spezialröhren 1962/63
Anonymous 10 Collector
More ...
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Just Qvigstad
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D3a: Manufacturer's Literature
Emilio Ciardiello
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):7
Collection of
Collection of a member from FIN Collection of a member from D Collection of a member from FIN Collection of a member from D |
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