2 Ninety Preamp Tube layout

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mikegguitars

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Does anyone know which tube is the input? there are three tubes inside the chassis. i am guessing its the one closest to the actual input jacks
 
Hi Mike (presuming that's your name),

The following site has your answers.

https://mesaboogie.zendesk.com/hc/en-us/articles/224863767-How-are-the-Tubes-arranged-in-a-Simul-Class-2-90-I-vs-II-
 
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