Radio-Katalog, Röhren, Halbleiter etc.
212A
| Sockel |
Large 4 pin Bayonet
|
| Anwender |
Senderöhre (Radio) |
| Heizung |
Uf 14 Volt / If 6.25 Ampere / Direkt / Spezifizierte Spannung ~ = |
| Beschreibung |
Tyne page 289-291: The experimental Type I tube was the forerunner of the Western Electric tube 212A, rated at 250 watts. Size about 13 5/8 inches high, 3 5/8 in diameter. Used as oscillator or modulator. Filament current 6.24 amperes at 12.5 to 14 volts. Anode 1500 volts for the current of 100-150 milliamperes - with an amplification factor of about 16 at an internal anode impedance of 2000 ohms. Assigned as CW-1819 by the Navy and VT-6 by the Signal Corps.
The 219A was the counterpart for the 212A as a rectifier, starting commercially in 1923 and we assume therefore that the 212A started in the same year. The 212A was replaced in 1924 by the 212D with a new filament for not having to classify for a filament resistance - and that tube lasted - inclusive the counterpart 219D from 1926 into the 1930s.
|
Abmessungen (BHT)
inkl. Stifte/Spitzli |
x 345 x 92 mm / x 13.58 x 3.62 inch |
| Gewicht |
744 g / 26.24 oz |
| Sammlerpreise |
1 Sammlerpreise (nur sichtbar für
Mitglieder Radiomuseum.org)
|
| Literatur |
Tube Lore (II) p. 234
Saga of the Vacuum Tube, Tyne Pages, 289 - 291.
Tube Lore (I)
Taschenbuch zum Röhren-Codex 1948/49
|
212A: Electrical Communication Vol.3 No.2, January 1924
Georg Richter
|
212A: Fin Stewart
Fin Stewart
|
|
212A: Banneitz, TB der drahtl. Teleph. 1927
Anonym 15 Sammler
|
Anzahl Modelle bei Radiomuseum.org
bestückt:1
Sammlung von
|
|
|
|
[rmxtube-ge, noindex]
| Datenkonformität |
Mehr Informationen |
|
|
|
