Related Manuals for Analog Metric 12AU7
Summary of Contents for Analog Metric 12AU7
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Page 1: User Manual
12AU7 Balance Pre-Amplifier User Manual Analog Metric www.analogmetric.com sales@analogmetric.com Copyright© 2009 All Rights Reserved www.analogmetric.com... - Page 2 The circuit design is referenced to Audio Research preamplifier. It supports both single- end and balance input and output (RCA and XLR). Basically, the circuit is differential amplifier with two cascade stages. The input stage uses 12AU7 with moderate voltage gain, whereas the output stage uses 6DJ8 (6N11). The differential amplifier provides high PSRR and capability to noise rejection.
- Page 3 [12AU7 Balance Pre-Amplifier ] Analog Metric FEATURES Two 12AU7 and two 6N11 (6DJ8) vacuum tubes. Voltage gain: 16dB (single-ended) and 22dB (balanced) Bandwidth: 20-100KHz Frequency Flatness: 40-20KHz (+/-0.1dB) S/N Ratio: >94dB THD: 0.147% @Vin = 0dBV and 1KHz 0.243% @Vin=10dBV and 1KHz Input impedance 500K Ω...
- Page 4 [12AU7 Balance Pre-Amplifier ] Analog Metric Do not attempt the measure the voltage by multi-meter with hand after power up. The probes of the multi-meter should be mounted by some stands to the points of the measurement before switching on the power supply.
- Page 5 [12AU7 Balance Pre-Amplifier ] Analog Metric www.analogmetric.com...
- Page 6 [12AU7 Balance Pre-Amplifier ] Analog Metric CHECKLIST 1. The polarity of the high voltage C3 and C3B. 2. The supply voltages at connectors (P1, P2, and P3). Check whether has 260V DC 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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