Antique radios, Old Time Radios
7731
|
Country:
United States of America (USA)
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|
| Identical to |
7731
|
| Similar
Tubes |
Other class quality (otherwise equal):
6U8
; ECF82
|
| First Source
(s) |
04.Jul.1960 : Electron Tube Registration List 2870
|
| Predecessor Tubes |
6U8
|
|
|
|
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| Data Compliance |
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