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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: RE: preamp vs power amp tube distortion posted by wheezer on August 14, 2014 at 14:53:40:
Generally speaking, yes although grid current can begin before the grid goes positive. Gain stage tubes are normally only required to handle very small PP swings and the bias point should not be close to allowing the positive peaks to reach 0V.
Another way of looking at it is from the plate's POV. A good operating point would allow the plate to swing reasonably equally both pos and neg before clipping,(which in a tube is really more like compression). Other than for driver stages I can't think of too many applications where you'd need a plate swing anywhere near the point where an overload condition would be reached, typically well over 100V PP in a linear design with only modest B+.
Of course, a tube can still be quite linear even on the grid's transition
to grid current if the driving stage is up to it and the right coupling is used, so we are really generalising here.
Naz
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- RE: preamp vs power amp tube distortion - Naz 17:24:16 08/14/14 (0)
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