How the USA military require valves to be tested:
http://tubetesting.yolasite.com/resourc ... -1311C.pdf
RCA's internal explanation of what valve ratings mean:
http://tubetesting.yolasite.com/resourc ... M8-210.pdf
"Getting the most out of vacuum tubes" - SAMS publication (1960):
http://tubetesting.yolasite.com/resourc ... mTubes.pdf
"The Measurement of Microphonic Effects in Vacuum Tubes" (orig. 1951)
http://www.pearl-hifi.com/06_Lit_Archiv ... ophony.pdf
Some interesting articles...
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jack
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#1 Some interesting articles...
Vivitur ingenio, caetera mortis erunt