Graham Slee PSU 1

• Perhaps stating the obvious, but what you hear from any amplifier or preamp is because current flows from a power supply and then back to it. Basic understanding sees that It leaves by one terminal and returns to another.
  
• Thanks to Kirchhoff's scientific current laws and the law of conservation of energy we can see current leaves from its origin somewhere in the power supply and has to get back to that origin. Signal current, no matter how well it is treated by the phono stage, must negotiate the inner workings of the power supply. Knowing that origin and how it gets back to it is crucial in understanding how best the micro-signal current returns to its origin with the least possible disturbance.

• Input range
  0.15mV to 0.8mV
• Output (for input range)
  2mV to 10mV, suitable for a moving magnet phono stage input
• Maximum input
  378mV rms (a very large overload margin)
• Maximum output
  4.914V rms
• Gain
  22dB (13) < 10Hz to 917kHz (-3dB points)
• Input impedance
  23, 30, 100, 840, 1000, 5100 and 47000 Ohms
• Output (driving/source) impedance
  300 Ohm
• Recommended load impedance
  47k Ohms phono stage preamp input
• Noise at output
  -99dB CCIR Q-pk
• Distortion
  0.02%
• Frequency response
  < 10Hz to 917kHz (-3dB points)
• Channel balance
  0.2dB
• Channel separation
  64dB
• Size (approx.)
  W: 107 x H: 50 x D: 180 (mm) inc. jacks
  

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