Quote:
Originally Posted by barretter
I doubt that your equalization is very accurate. You can't just stick a CR combination with a time constant of 75 us in the signal path : you have to take into account the output impedance of the EF86 and the input impedance and Miller capacitance of the following triode. And using negative feedback for the other two poles is even more complicated. You can find all the grisly details in Morgan Jones' books.
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RIAA was within +/-1dB from 20Hz to 20kHz as it happens!