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Single Ended Triodes (SETs), the ultimate tube lovers dream.

RE: recommendations for an SET integrated amp

91derlust ;
You wrote..."Paralleled tubes produce greater power and simplify transformer winding somewhat. They are also harder to drive (increased Miller C), place more demands on power supply and cathode bypass design (larger C required for equivalent performance). Moreover, they introduce the variable of trying to match the two tubes as they age - no two tubes perfectly match and that situation is likely to worsen with age."

Can you explain why the paralleled tubes , aging at different rates , would affect the final output ?

Thank you .

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