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Making of a vacuum tube
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07-18-2016, 05:53 PM
Mikado463
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Join Date: Aug 2011
Location: SE Pa
Posts: 3,925
Making of a vacuum tube
Not sure this one has been posted before, so here goes ......
https://www.youtube.com/watch?v=jNVZ8Pg3poo
Last edited by jdandy; 09-04-2017 at
11:06 AM
. Reason: make link active
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