Introduction - Analog Metric M7C SRPP User Manual

[M7C SRPP Pre-Amplifier ] Analog Metric

INTRODUCTION

The circuit design is referenced to the Marantz and the output stage is modified to 12AU7
SRPP to provide width bandwidth and low distortion. The design values are adjusted and
optimized. The input stage uses 12AX7 in common cathode, whereas the output stage
uses 12AU7. The signal paths of this PCB layout are designed in symmetry for both
channels. Dedicated power rails, ground, and signal paths, altogether are taken into
design considerations so that all are to minimize the parasitic, cross interference, and
influence of RFI.
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