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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: Wow, these tubes are expensive! posted by Jay Buridan on March 20, 2021 at 10:56:48:
The GZ34 was introduced in 1954.
Those are not GZ34s, and they are not 1930s.
Octal base was first introduced in 1935 by RCA for metal tubes.
They are in fact GZ32s, most likely Brimar made. Whether Brimar or Mullard, they will have codes somewhere. If they are not on the bottom base, then they are likely after 1954.
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Follow Ups
- RE: Wow, these tubes are expensive! - baileyler 08:38:27 03/21/21 (2)
- Exactly! - maxhifi 11:17:23 03/22/21 (0)
- Thanks, that's so interesting - Jay Buridan 13:38:39 03/21/21 (0)
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