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RE: LCR Phono stage

I can't undestand why there are a posts around trafo volume control.
Then the use of CF to drive in A2 is a bad solution due the non linear current in a grid of power tube because the impedance falls quickly with the swing (a lot of volts) in the region of positive Vg; just to look on the data sheet.
And it is not a case that on curves of output tubes for Audio the positive region of Vg aren't specified. They stop at 0 volt
In same case with big triodes but there is also the figure of the grid current that is always not linear
In the LCR phono the swing is limited and the correct set point for this job allow a very goodo performances.

Walter

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