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In Reply to: RE: Your subject and your tagline posted by Lee of Omaha on February 02, 2015 at 08:24:24
...I'm suspicious of current production stock because I'm not convinced today's mfgrs pay as much attention to maintenance of their machinery as mfgrs of 60 years ago did. This includes factors such as the precision of grid winding pitch and alignment of electrodes where that is a factor such as in a beam tetrode. Since such a large proportion of today's production ends up in musical instrument amps where distortion is sorta desirable, this situation probably drives mfg practices.
Some of the nicest sounding tubes I've played with are late 20s/early 30s designs like #45. I speculate that much attention was devoted to inherent linearity in both basic design and in implementation back then because circuits were primative and corrective feedback wasn't in widespread use. Just an opinion/observation w/o numbers or hard facts as backup.
Follow Ups:
Steve
I know what you mean especially after watching that Mullard film of how meticulous they were and the precision machinery used to build these tubes.
I do think competition have made the tubes a lot better and hopfully they will continue to improve..Technology with computerized trimming of elements and spacing have also played a major role in helping to improve the tubes.
"If it measures good and sounds bad, it is bad; if it measures bad and sounds good, you have measured the wrong thing."
- Daniel R. von Recklinghausen
Edits: 02/02/15
i miss other modern KT`ies besides GL RI in your comparison. Penta Labs, Shugunag Treasure Z and Psvane KT88 sound fantastic, even better than GL RI in MY ears.
N.
The times, they are changing...
Nunki
I think you may have been addressing me and I agree totally with you.I love all those tubes you mentioned and I sold my Treasures and I need to get another quad.I only tested these three this time because I was lazy but I agree with you that the Shuggies are fantastic..I like the Gold Lion reissues a lot of because they are durable,sound good in most amps,and are reasonable in price..The Shuggie Pentas solid plates are one of my favorites as well..This test I did is not the end all,end all.I just happened to point one characteristic I like in the black plates in the McShaned Mac Mc275...YMMV.
"If it measures good and sounds bad, it is bad; if it measures bad and sounds good, you have measured the wrong thing."
- Daniel R. von Recklinghausen
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