Antique radios, Old Time Radios
OBC3
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Tube type: |
Double Diode-Triode Audio Frequency |
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Tube ID = 19812 |
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| Identical to |
OBC3
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| Similar
Tubes |
Other shape (e.g. bulb type):
12SQ7GT
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| Base |
Octal (Int.Octal, IO) K8A, USA 1935
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 12.6 Volts / If: 0.15 Ampere / -: Indirect / -: Parallel / series AC/DC / |
| Literature |
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W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe
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H.Weigl
Helmut Weigl
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| Further Information for |
OBC3 |
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Mysterious P-, O- and U- tube-series:
(07.10.2007) Jacob Roschy
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Clicks: 819 Replies: 2 |
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By doing research in the "Brans Tube Vademecum 1947", as well as in the "Röhren-Codex", I found 3 mysterious tube- series:
- an O - series with 0.15 A heater current, consisting of OBC3, OBF2, OCH4, OH4, OF1, OF5, OF9 and OM5 .
By further investigating I found out, many of them are similar or equal to other better known tube types, some others differ only in heater data.
Here are the results as follows:
Equivalent types:
OBC3
12SQ7(-GT)
OH4
12A8(-GT)
OF1
6S7(-G-GT)
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