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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Low vs High Operating Points posted by danlaudionut on May 8, 2007 at 03:45:27:
Right around 250 Vp and 34 ma Ip the distortion spectra of my little 6cw5 SE starts at low levels with relatively high 2nd and 3rd and 4th just above the noise floor, some 85 dB+ down. As power output rises 3rd comes up with 4th close behind until a point is reached at which 3rd starts dropping and only the even harmonics rise. It maintains that balance to near clipping. The biasing of this tube meets neither of the criteria discussed and was chosen specifically for the behaviour demonstrated by the 3rd harmonic. It sounds wonderful and is my fave build of about a dozen so far.In general though it's almost universal in my experience that high and cold results in significantly more benign 2nd harmonic but much less of the far more objectionable higher harmonics above approximately the 4th.
Thermionically addicted.
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Follow Ups
- False dichotomy? - rdf 21:15:05 05/11/07 (1)
- Re: False dichotomy? - danlaudionut 23:49:38 05/11/07 (0)
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