Construction

General:

Generously build pre-amplifier made in Japan in the1980's.

 

Front ^

Special features:

All properties a simple high-end pre-amp should have are in this design.

 

 

Specifications:

C-03.
Output voltage: 1 Volt per channel at ~ 4K Ohm.
Frequency range: 15 - 25,000 Hz (+/- 1.0 dB)
Harmonic distortion: less than 0.004%
Intermodulation distortion: less than 0.01%
Signal-to-noise ratio: >105 dB
Crosstalk damping: >65 dB
Treble control: +/- 10dB at 20kHz
Bass control: +/- 10dB at 50 Hz
Loudness control: at 100 Hz + 10dB and at 10kHz + 3dB
Noise & rumble filter: -6dB / octave
Input sensitivity @ 1kHz and maximum output:
         Record player DIN: 2,5mV @ 47k Ohm.
         Tape A: 150mV @ 80k Ohm.
         Tape B: 150mV @ 80k Ohm.
         Tuner: 150mV @ 80k Ohm.
         Tape monitor: 150mV @ 80k Ohm.
         MC input: 0,2 mV @ 100 Ohm.
Output impedance: headphones 600 Ohm.
Power supply: 220/250 volts 5W max.
Dimensions: 80 x 250 x 430 mm.

 

 

 

Interior  ^

 

User Manual:

Click here to download the.

 

Schematic:

Click here to download the service manual of the

This quite simple pre-amp consists basically of a

The outputs are relay switched that is very convenient.

 

Click here to download the schematic diagram of the

 

Modifications:

To get a fine high quality pre-amp you have to do little upgrading, the power supply is noticeable simple.

The used electronic parts are of good quality, but aging is an issue so some parts should be replaced.


 

 

 

 

 

Backpanel ^

 

Phono MC stage ^

 

 

Tone section ^

 

Sound:

The sound of the restored

CONSTRUCTION

 

< back to main page