![]() This project is not affiliated, endorsed or supported by AMS/Neve in any manner. Neve is a registered trademark of AMS/Neve Inc. Special thanks goes out to gearslutz user Cabirio, who helped a lot in optimizing the circuit.DDMF’s Plugindoctor has been a great tool for measuring and referencing my circuit with the plugin.I’ve used the Waves Scheps 73 plugin as my main reference for the frequency response.The inductance and resistance values for the different inductors have been taken from here. ![]() The following article from Rod Elliott has been very helpful in understanding and implementing gyrators.So if you change the value on one side (turning the imaginary resistor) you need to change the other resistor accordingly. asc schematic:) LTSpice is freely available from Analog Devices Īs there are no potentiometers in LTSpice, I used serial resistors instead. Feel free to play around with the circuit using the LTSpice.This effect is a characteristic of the original circuit (see ) The presence band shows lower maximum gain at higher frequencies.TL07x opamps will get the job done, but I got better results (lower noise at line level), by using NE5532 Opamps for the amplifiers, as well as for the gyrator circuits.The two amplifiers on the BA284 board, that are used for the EQ circuits, function like basic inverting Op-Amps (see ).The BA211 board caused me quite a headache, until I finally figured out, that the original circuit only uses the 200mH tap of the T1280 inductor. ![]()
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