General > General Technical Chat
Quality of old Chinese Valves/Tubes is High!!?
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GlennSprigg:
I unashamedly love all of "Mr. Carlson's" videos. (No-one speaks clearer).
Anyway, in one of his old posts, be was repairing an old but well known Guitar Amplifier, and replaced a 1st stage Tube. (Intermittent internal short from the heater filament to the surrounding cathode).  He talked a bit about the extreme vibrations inside the amp, due to the large internal speakers, that literally shake the shit out of the valves/tubes.
He said though, that he would normally love to use tubes labelled as "Made in USA", but they are not as strong internally.  Although a lot of 'modern' stuff from China may be cheap & nasty, he says that back in the days of Tube production, their manufacture of such copies were much more internally robust, and were  built to last!!  :-+
jxjbsd:
Generally speaking, the quality of electronic tubes produced in China in the 1960s-1980s is very stable.These electronic tubes are not of very high quality, but there is no problem in normal use.
GlennSprigg:
Thanks.  Yea, he said he would not argue about 'Audiophile' quality, as it's always
in the 'ears' of the beholder...   :)
GlennSprigg:
Just to add to that??...
What IS it that certain 'Audiophiles' try to explain about Quality??  It's a physical mechanical device with plates and a vacuum. Is it about the actual mechanical design/shape etc of the plates/parts within??  I can't get my head around that...  :o
jxjbsd:
 I belong to one of them 。 :-DD
but,I can't fully understand the behavior of these people.
In my opinion, the main differences of electronic tubes are: 1 material, 2 electrode mechanical accuracy, 3 vacuum degree
High quality electronic tubes are usually produced by these companies: GEC,MULLARD   STC Mazda、Brimar  ,Telefunken Valvo   From Britain and Germany  ,and  PHILIPS .
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