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[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.
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[M7C SRPP Pre-Amplifier ] Analog Metric FEATURES Two 12AX7 and two 12AU7 vacuum tubes. Voltage gain: 20dB Bandwidth: 500KHz Frequency Flatness: 20-20KHz (+/-0.1dB) S/N Ratio: >91dB THD: 0.02% @Vin = -1dBm and 1KHz 0.05% @Vin= -10dBm and 1KHz Input impedance 470KΩ...
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[M7C SRPP Pre-Amplifier ] Analog Metric Turn off the power supply if you observe any smokes or hear strange sound coming out from the transformer or board. If there is short circuit, the transformer will be getting very hot shortly.
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[M7C SRPP Pre-Amplifier ] Analog Metric CHECKLIST 1. The polarity of the high voltage C7 and C7B. The supply voltages at connectors (P1 and P2). Check whether has 260V DC applied to two pins of P1. If you have any problem in assembly, please contact us by email to tech@analogmetric.com...
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