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RE: 45 SET distortion spectrum graph.

Hey,

You say at 1/8W you are at -39dB on the 2nd order. this is just over 1% (40dB is 100:1 or 1%) Your graph shows the 2nd at about -26dB which translates to a 1:20 ratio or 5% 2nd order distortion but you don't state what power level the graph was taken at.

In either case the numbers seem high, but given the natural decay of the harmonics is seems that the distortion spectrum is being dominated by a single device.

as tre mentioned a schematic with operating points would be helpful.

dave



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