Antique radios, Old Time Radios
D1_Mazda_GB
|
Country:
Great Britain (UK)
|
|
| Identical to |
D1_Mazda_GB
|
| Similar
Tubes |
Normally replaceable-slightly different:
2B36
; QF196
Different maximum ratings:
CV1078
; VR78
Heater and shape different:
EA50
|
| First year |
1937
?
-- Collector info (Sammler)
|
| Base |
3 pin wires in line (1937, B3G)
Wires only.
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 4 Volts / If 0.2 Ampere / Indirect / Specified current AC/DC ~ = (Series working) |
| Description |
The Mazda D1 was the world's first miniature valve with an indirectly heated cathode. It was the basis for the EA50. Originally designed for TV use, the D1 was used in parallel as the switches in the duplexing system of Type 79B, and subsequently Type 281 radars. The Mazda D1 was also used in receivers at up to 100MHz.
Text in other
languages (may
differ)
|
Dimensions (WHD)
incl. pins / tip |
x 46 x 11 mm / x 1.81 x 0.43 inch |
| Weight |
10 g / 0.35 oz |
| Information source |
- - Manufacturers Literature Ediswan Mazda Valves 1949-1950 catalog
Universal Vade-Mecum, Electron Valves and Semiconductor Devices Section 69, p. 94
|
|
D1_Mazda_GB: U.G.
Urs Gloor
|
Just Qvigstad
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D1_Mazda_GB: Original data sheet
Otto Galli
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):14
Collection of
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