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Quick Details

  • Brand Name: Analog Metric
  • Type: Professional Amplifier
  • Channels: 2 (2.0)
  • Place of Origin: Hong Kong

Specifications

One 12AX7 and one 12AT7 vacuum tubes

INTRODUCTION

The circuit design is referenced to the Conrad John and the values are adjusted and optimized. The input stage uses 12AX7in common cathode, whereas the output stage uses 12AT7.  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 designconsiderations so that all are to minimize the parasitic, cross interference, and influence of RFI.


FEATURES

  • One 12AX7 and one 12AT7 vacuum tubes.
  • Voltage gain: 26dB
  • Bandwidth: 50KHz
  • Frequency Flatness: 20-20KHz (+/-0.6dB)
  • S/N Ratio: >94dB
  • THD: 0.057% @Vin = -10dBm and 1KHz

          0.087% @Vin= -6.4dBm and 1KHz

  • Input impedance 1M Ohm
  • Output impedance 3K Ohm
  • Two single-ended and two single-ended outputs.
  • Symmetric layout design and signal paths with minimum parasitic.
  • Dedicated ground and power rails layout design.
  • Two large reservoir decoupling capacitors for power rails.
  • Power requirements: one 260V (10mA) DC, and one 12.6V (0.5A) DC.
  • PCB dimension: 18.4mm (W) x 11.2mm (L)
  • PCB thickness: 2.4mm, double layer, 2oz copper.

 

Options

1. Toroidal Power Transformer T30L
2. BJT Variable HV Regulator Kit

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