Uploaded November 2020 | Updated September 2026, 2 weeks ago

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BG286 - I get the question a lot about swapping out KT88s with KT120s or KT150 tubes in people's amplifiers. The answer isn't so straight forward and thus I wanted to provide some education on the topic.

Link to Rob Borinette's site on load line calculations
robrobinette.com/Drawing_Tube_Load_Lines.htm