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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: RE:IT might be a 5755 posted by Palustris on August 30, 2015 at 11:54:36:
Has to be the 5755, likely Raytheon manufacture as said. I believe that most of the Western Electric manufactured 420A's were clear tops, actually all clear glass, appearing to not have a getter at all. IIRC, they used some sort of powder as getter material.
I know that W.E. subcontracted companies to manufacture their types, so technically, these could really be "W.E. tubes".
I have used the 420A in place of 12AX7's in a preamp (re-wired), and the sound was harmonically rich and initially pleasing, but not accurate. Likely, for the reasons you have stated. They sounded like a really fat Mullard or old RCA black plate 12AX7. It was a fun 'roll' anyway.
Not exactly what I'd call an "HD" 12AX7 sub, if anything, the exact opposite.
Cory
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Follow Ups
- 5755/ 420A vs. 12AX7 - Cory M. 20:45:19 08/30/15 (1)
- RE: Hey! I got a whole box of 5755 if anyone wants to join the party - DAK 00:03:59 09/02/15 (0)
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