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Videos explaining a number of topics concerning tube amps

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Hello everyone,


I was reading and, quite frankly, got buried in amplifier terminology. So, I decided to do some internet browsing for help. My initial question was about negative feedback mechanisms. I did find information about that, but I ended up finding even more. There is a chap that goes by the name "Uncle Doug" on youtube that does a great job of explaining topics that had me scratching my head. 


This link is part 1 of 2 where he talks about triode, tetrode and pentode tubes, their design, a bit of history, and the advantages and limitations of each:


Negative feedback loops:


Direct link to all his videos:



P.S. - Rusty has his own agenda!


Hope this is worth your time,



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