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In Reply to: RE: recommendations for an SET integrated amp posted by RGA on May 06, 2017 at 07:31:53
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 .
Follow Ups:
Audio Note amplifiers all autobias. I have not heard anyone say there were any of these problems with any Audio Note amplifiers. Can't speak to lesser designs using lesser quality parts.
You may want to direct the question at 91derlust or indeed send an e-mail to Audio Note asking them about tube drift in a parallel designs to see if this is an area of weakness.
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