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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Just outta curiosity posted by FenderLover on October 19, 2012 at 21:29:39:
You have yto understand the history.
The earlier power tubes like the 2A3 used 2.5 volt filaments. Batteries were much lower voltage earlier on. The rectifiers were next to be developed and they simply employed twice the filament voltage for the power tubes.
The advent of 6.3 filament voltage parallels the development of automotive batteries. The early voltages were 6.3 volts and later expanded to 12.6 volts, in the 60's. Thus noting the filament voltages you can pretty much date the development of a particular tube.
Stu
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Follow Ups
- RE: Just outta curiosity - unclestu 10/20/1208:36:42 10/20/12 (5)
- " :Rectifiers were next to be developed " - FenderLover 09:01:54 10/20/12 (4)
- You gotta - unclestu52 09:29:56 10/20/12 (3)
- You still gotta - Alpha Al 09:53:05 10/22/12 (0)
- Ah! That makes sense. - FenderLover 09:43:12 10/20/12 (1)
- Stu... BTW - FenderLover 10:24:06 10/20/12 (0)
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