JADIS tube preamplifier circuit

The schematic diagram is shown below. This circuit is taken from the classic circuit of the French "JADISJP2000" flagship preamplifier. It uses 12AT7 for two-stage voltage amplification and 12AT7 for cathode output. This allows the impedance of the front and rear stages to match well and improves the load capacity. In order to obtain a larger output current and lower output impedance, this circuit uses dual triodes in parallel.