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In Reply to: But even more important... posted by Triode_Kingdom on June 14, 2005 at 13:20:52:
>>And as if that's not bad enough, the plate curves show significant non-linearity compared to a 6SL7. I don't know why this argument persists, year after year. It's all right there in black and white.>>Yes, it is in black and white. Let's take our data from the Sylvania Technical Manual (12th Ed.)
Using the same B+ and lowest distortion operating point given, the output vs. distortion for each type is:6SL7
10.2V at 0.7%12AX7
7.1V at 0.2%Since distortion is proportional to signal voltage, we can reduce the 6SL7's output voltage to 7.1 and its distortion by the same ratio - in order to do a direct comparison.
7.1/10.2=0.696
0.696*0.7=0.487So at 7.1V output, the 6SL7 will have roughly 0.48% distortion compared to 0.2% for the 12AX7. Clearly the 12AX7 is more linear, given the same B+, and held within certain input limits.
Joel
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Follow Ups
- how about some numbers - Joelt 14:56:05 06/14/05 (6)
- How about ALL the numbers... - Triode_Kingdom 20:02:35 06/14/05 (4)
- how about them... - Joelt 06:35:58 06/15/05 (3)
- Not real world - Triode_Kingdom 08:18:47 06/15/05 (2)
- Welcome to the 'real world". - cheap-Jack 12:29:07 06/15/05 (0)
- you're changing the parameters of your argument - Joelt 09:21:42 06/15/05 (0)
- You're just confusing the opinions with facts Joel. - kyle 15:13:51 06/14/05 (0)
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