Antique radios, Old Time Radios
1851
 |
| Identical to |
1851
|
| Similar
Tubes |
Other shape (e.g. bulb type):
R219
|
| First Source
(s) |
Apr.1938 : -- Original-techn. papers.
|
|
| Base |
Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Uka)
Top contact with a cap
|
| Filament |
Vf 6.3 Volts / If: 0.45 Ampere / -: Indirect / -: Parallel, (AC/DC) / |
| Description |
Television RF/IF pentode. 300V max plate, 150V max screen, 9000 micromhos Gm. Small control grid top cap.
|
| Literature |
Taschenbuch zum Röhren-Codex 1948/49
-- Original-techn. papers. Electronics, April 1938
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Internet
Miguel Angel Trujillo-Rodriguez
|
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|
Eigene
Patrice Zeissloff
|
|
Telefunken Werkstattbuch
Wolfgang Bauer
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| Usage in Models (calculation each 25th of the
month) |
1= 1938? ; 2= 1938 ; 1= 1939? ; 1= 1950 ; 1= 1951?? ; |
| Number of Models at Radiomuseum.org with
this tube (valve, valves, valvola, valvole,
válvula, lampe): 6 |
|
| No further Information
for |
1851 |
|
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