| Country: |
United States of America (USA) |
|
Brand: |
Common type USA |
| |
Tube type: |
Double Diode-Triode Audio Frequency |
|
Tube ID = 2972
|
 |
| Identical to |
55
= UZ-55
= A255
|
| Similar
Tubes |
85 (Heater different)
|
| First Series |
1931 Radios von gestern |
| First Source
(s) |
Sep.1932 : -- Collector info (Sammler)
|
| Successor Tubes |
85
6R7GT
|
|
| Base |
6-Pin-Base U6A, old, USA (Codex=Ka)
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
-: Indirect /
-: Parallel, (AC/DC) /
If: 1 Ampere /
Vf 2.5 Volts /
|
| Tube prices |
0 Tube prices (visible for members
only)
|
| Literature |
Essential Characteristics, GE 1973
Taschenbuch zum Röhren-Codex 1948/49
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Internet
Miguel Angel Trujillo-Rodriguez
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 |
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TreLe
Trev Levick
|
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Telefunken Werkstattbuch
Wolfgang Bauer
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Sylvania Technical Manual
Peter Hoddow
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