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Re: Tube Distortion and Bias ... a perspective

Naz
I can bet your not using the 300b on the Logans..Anyway that is strange as I look at the input distortion numbers to the 300b is lower with the Russian 6N8P as compared to the 6sn7 and this is on the 2nd,3rd,and 4th harmonics and yet the output distortion numbers are higher inspite of having lower input distortion. I dont see how you can put in lower distortion figures with one tube and yet the output numbers are higher than the tube with the higher distortion in the 1st place..I believe your measurements but are you using any global feedback going back to the driver stage? That would account for some of that..The numbers are very low in all cases anyway and if you used different equpiment that could account for some of it to..Anyway thats excellent data you collected and it can help a lot.


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