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Post by zpilot on Jul 25, 2017 7:57:18 GMT -7
I stumbled across this on YouTube. It gives a glimpse of the complexity of vacuum tube manufacturing. The vacuum tube portion begins at 9:22. Note the device at 9:48. It is tapping the tubes with a cork. It looks like a pretty severe test to me, similar to how I test for microphonics. Well maybe I don't tap quite that hard. Also note the testing fixture at 11:12. I believe each one of those light bulbs is in series with a tube and used as a current limiter and indicator of a short. Any of you who do repair work should recognize that.
This is an RCA factory but all of the major manufacturers were similar. I can see why NOS tubes last so long and sound so good compared to current ones. I seriously doubt that Russian and Chinese manufacturing is anything like this.
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Post by BritInvasion on Jul 25, 2017 7:59:41 GMT -7
Fascinating. One plant making 4 million tubes per month! Thanks for posting it.
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Post by helmi on Jul 25, 2017 17:16:23 GMT -7
I like how neatly everybody's dressed!
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Post by Rhythmark on Aug 19, 2017 9:30:46 GMT -7
Looks super complicated!! Who ever could make a new company making quality tubes these days could make a fortune!! Looks like too much work for me!
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Post by zpilot on Aug 19, 2017 11:13:36 GMT -7
Looks super complicated!! Who ever could make a new company making quality tubes these days could make a fortune!! Looks like too much work for me! I know you have heard this before. How do you make a million dollars making vacuum tubes? Start out with 10 million dollars.
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Post by purpletele on Aug 19, 2017 11:39:34 GMT -7
Looks super complicated!! Who ever could make a new company making quality tubes these days could make a fortune!! Looks like too much work for me! I know you have heard this before. How do you make a million dollars making vacuum tubes? Start out with 10 million dollars. 10 million wouldn't even touch the start up costs. I bet it would be 50 million
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Post by Rhythmark on Aug 19, 2017 13:54:41 GMT -7
I sure dont know! But it seems you could use a smaller computer! Looks like rocket science!!
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Post by zpilot on Aug 20, 2017 0:02:58 GMT -7
I'm sure that wasn't even a computer. Just a CRT for testing TV tubes.
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