Antique radios, Old Time Radios
872A
| Base |
Jumbo 4-pin bayonet (1918) (Codex=Bz)
Top contact with a cap.
|
| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 5 Volts / If 7.5 Ampere / Direct / Specified voltage AND current AC/DC |
| Description |
High-voltage mercury-vapor rectifier
Work started on the development of this tube at the RCA laboratories in the summer of 1932. The type number was assigned to it early in 1933 and it was announced in April, 1933. Registered on September 24, 1943. Shielded element structure. T-18 bulb, medium cap (JETEC C1-5) and Jumbo 4-pin bayonet base, JETEC A4-29.
- 4.75 to 5.25 V filament voltage
- 7.5 A filament average current, 8 A max
- 30 s min heating time
- 10 kV max PIV at Tamb 20º to 60ºC, derated to 5 kV PIV at 70ºC
- 1.25 A average anode current, 5 A peak
|
Dimensions (WHD)
incl. pins / tip |
x 217 x 58 mm / x 8.54 x 2.28 inch |
| Weight |
225 g / 7.94 oz |
| Tube prices |
4 Tube prices (visible for members
only)
|
| Information source |
Essential Characteristics, GE 1973
Universal Vade-Mecum, Electron Valves and Semiconductor Devices Section 66, p. 89 & 90
- - Manufacturers Literature
Taschenbuch zum Röhren-Codex 1948/49
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872A: Vacuum Tube Rectifier
Günter Kudicke
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872A: L.N
Lars Nord
More ...
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872A
Emilio Ciardiello
More ...
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872A: Handbook Raytheon amateur tubes
Miguel Angel Trujillo-Rodriguez
More ...
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from Just Qvigstad
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1
Collection of a member from D
Collection of a member from FIN
Collection of a member from D
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