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Table of Contents
5687
5687
Tube
Tube
5687
5687 Tube
Tube Pre-Amplifier
User
User
Manual
Manual
User
User Manual
Manual
Analog
Analog
Metric
Metric
Analog
Analog Metric
Metric
www.analogmetric.com
Pre-Amplifier
Pre-Amplifier
Pre-Amplifier
www.analogmetric.com
sales@analogmetric.com
Copyright© 2009 All Rights Reserved
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Summary of Contents for Analog Metric 5687
- Page 1 5687 5687 Tube Tube Pre-Amplifier Pre-Amplifier 5687 5687 Tube Tube Pre-Amplifier Pre-Amplifier User User Manual Manual User User Manual Manual Analog Analog Metric Metric Analog Analog Metric Metric www.analogmetric.com sales@analogmetric.com Copyright© 2009 All Rights Reserved www.analogmetric.com...
- Page 2 The circuit design comprises of two stages: the first stage uses 12AU7 vacuum tube in common-cathode configuration which provides moderate gain, minimum noise and high linearity to the amplified signal; The output stage uses 5687 or its equivalent 6N6-T as buffer to deliver sufficient power to the load. In additional to pre-amplifing input signal, this amplifier is capable to drive headphone directly whose impedance is often very low.
- Page 3 Analog Metric Metric FEATURES FEATURES FEATURES FEATURES • One 12AU7 and two 5687 (6N6-T) vacuum tubes. • Circuit design comprising two stages: common-cathode stage and followed by a buffer stage. • Voltage Gain: 22dB • Bandwidth: 850KHz • Input Sensitivity: 1Vrms •...
- Page 4 [ [ [ [ 5687 5687 5687 Tube Tube Pre-Amplifier Pre-Amplifier Pre-Amplifier ] ] ] ] Analog Analog Metric Metric 5687 Tube Tube Pre-Amplifier Analog Analog Metric Metric • Turn off the power supply if you observe any smokes or hear strange sound coming out from the transformer or board.
- Page 5 [ [ [ [ 5687 5687 5687 Tube Tube Pre-Amplifier Pre-Amplifier Pre-Amplifier ] ] ] ] Analog Analog Metric Metric 5687 Tube Tube Pre-Amplifier Analog Analog Metric Metric CHECKLIST CHECKLIST CHECKLIST CHECKLIST 1. The polarity of the high voltage capacitorsC1, C4, C6 and C9.
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