Sansui 331 FM/AM Stereo Receiver, 1974-1976, made in Japan

 

Link: radiomuseum | hifi-wiki

General

• Manufacturer: Sansui
• Model: 331 (version 331 L with long shaft, version 331 SS without MW, but with KW 1 and KW 2)
• Years of construction: 1974 - 1976
• Manufactured in: Japan
• Colour: silver, wooden case
• Remote control: -
• Power consumption: 90 W max.
• Dimensions: 424 x 125 x 266mm
• Weight: 5.7kg
• New price approx.: 695 DM

connections

• Number of inputs:
  • Phono MM: 2.5 mV / 50 kOhm, 120 mV max.
  • AUX: 150mV / 50k ohms
  • Tape Play: 150mV / 50k ohms
  • Tape Play DIN: 150 mV / 50 kOhm
  • antenna MW
  • Antenna VHF 300 Ohm Balanced
  • Antenna VHF 75 Ohm Unbalanced
• Number of exits:
  • Tape Rec: 150mV
  • Tape Rec DIN: 30mV
  • Headphones (6.3 mm jack, front)
  • 2 pairs of speakers

Technical specifications

amplifier

• continuous power
  • 8 ohms: 2 x 6 W (20 Hz - 20 kHz), 2 x 6 W (1 kHz)
  • 4 ohms:
• dynamic performance
  • 8 ohms: 13W
  • 4 ohms: 14W
• THD: 1.0%
• Damping factor: 30 at 8 ohms
• Frequency Response: 40Hz - 20kHz
• signal-to-noise ratio:
  • Phono MM: 70dB
  • High Level: 80dB
• Tone control:
  • Bass: ±12dB @ 50Hz
  • Treble: ±10dB at 10kHz
• Loudness: +10dB at 100Hz, +8dB at 10kHz
• High filter:
• Low Filter (Subsonic):
• mute:

tuner

• Reception: VHF, MW
• Frequencies:
  • FM: 87.5 - 108MHz
  • AM: 525 - 1,605 kHz
• Frequency response: 30 - 15,000 Hz, +0.5dB, -3dB
• Input Sensitivity:
  • VHF: 2.5 µV (IHF)
  • MW:
• Distortion factor:
  • FM: 0.8% (Mono), 1.0% (Stereo)
• signal-to-noise ratio:
  • FM: 65dB (stereo)
• Channel Separation:
  • FM: 35dB (at 1kHz)
• selectivity:
  • FM: 60dB
• Simultaneous selection:
  • FM: 1.5dB
• spurious selection:
  • FM: 70dB
• Image Rejection:
  • FM: 50dB
• IF damping:
  • FM: 70dB
• AM Rejection: 50dB

Special equipment

• VHF muting

Разбираем - чистим - моем - меняем:

Желтый мрак лампочек электронакаливания меняем на тот же формфактор но уже диодные лампы