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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: bad tubes posted by Sector-7G on September 26, 2004 at 14:35:07:
Hi Doug,"What I am curious about is the nature of this misalignment. As in what is causing the misalignment, and in what direction? radial, axial, some combo?"
Beats the s**t out of me. I just don't know, and without precision measuring equipment I don't know how I could even tell.
I'm sure the cause is poor assembly, the reason for the poor assembly isn't known to me. I don't see any difference in the mica, although it wouldn't take much to get it out of line. If they changed it I don't know about it. But that's not saying they didn't.
The red plate isn't nearly as scary as looking inside the tube and seeing so many turns on the screen winding glowing white!
This is the same thing that happened when the then Svetlana (now SED) 6550 first came out. In fact, speaking with Eric Barbour he informed me that the plate holes in the later 6550 tubes were designed to allow use of a special tool specifically for alignment of the screen. Once the tool came into use the red spots on the tube disappeared.
And if the KT-90 was the only Ei tube that went in the toilet quality-wise, you might think it was something unique to that tube. But all the Ei stuff went bad it seems (to a greater or lesser degree).
I wish I could tell you more, but I'm at the limit of my tube manufacturing process knowledge.
If the damn EH KT-90 sounded good I wouldn't care, but it sounds lousy. Certainly nowhere near the Ei.
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Follow Ups
- Re: bad tubes - Jim McShane 12:45:48 09/27/04 (0)
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