Tube DIY Asylum: RE: Tube number origins by Tom Bavis

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RE: Tube number origins

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Tom Bavis

In Reply to: RE: Tube number origins posted by deafbykhorns on December 8, 2020 at 12:36:50:

The middle letters were assigned more or less in order (rectifiers in reverse, from "Z"), but the single-ended tubes introduced in 1938-41 were an exception. The single letters had mostly run out. Many single-ended tubes were assigned "S" plus the letter of its top-cap predecessor, with SN7 being "somewhat" like the earlier 6N7 dual triode. So if you knew what a 6K7 was, you knew what the "new" 6SK7 was.

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Amplified Parts

Topic - Tube number origins - RayP 11:40:49 12/8/20 ( 3)

RE: Tube number origins - Triode_Kingdom 12:21:52 12/8/20 ( 2)
- RE: Tube number origins - deafbykhorns 12:36:50 12/8/20 ( 1)
  - RE: Tube number origins - Tom Bavis 12/9/20 13:30:42 12/9/20 ( 0)