SANSUI SM-90
¥ 74,000 (released in 1964)
Commentary
A high output FM/AM receiver that also supports FM stereo.
Four 25E5 high-gm tubes are used for the power amplifier tube, and the maximum output power of 40W + 40W was achieved by the receiver at that time.
Four transistors are used in the preamplifier section to eliminate the influence of hum and noise.
The fixed bias method also reduces distortion.
The power supply and output transformer use an Orient Core to achieve broadband characteristics from 10 hz to 70 khz.
A silicon diode is used for the power supply rectification circuit to improve the power supply regulation.
Built-in FM multi-stereo adapter circuit allows one touch reception of FM stereo broadcast transmission.
It is equipped with various functions such as high / low filter, loudness and presence, tone control, FM-AFC and tape monitor circuit.
It has a headphone port.
Model Rating
| Type | Stereo integrated amplifier |
| Maximum power output | 40W+40W |
| Frequency characteristic | 10 Hz to 70 kHz ± 1 dB |
| Distortion factor | 1% or Less (at 33W output) |
| Gain (input required for output 30W) | Phono MAG : 85 dB, 1.2 mV Phono X-TAL : 59 dB, 25 mV Tape, MIC : 89 dB, 0.65 mV Aux : 57 dB, 31 mV |
| Receiving frequency | FM : 76 MHz to 90 MHz AM : 535 kHz to 1605 kHz |
| Tuning instruction | Tuning meter (for both FM and AM) |
| Accessory circuit | Presence control High / low filter Loudness control Tape monitor Headphone |
| Used vacuum tubes, etc. | Vacuum tube 6AQ8x2 6BL8x1 6BE6x1 6BA6x3 12AX7x2 12AT7x1 12AU7x1 6AN8x2 25E5x4 Transistor 2SB51x4 Diode OA-81x10 (Germanium) SE-0. 5Ax2 (Silicon) Selenium rectifier TC-0.2P11/3x1 |
| Power supply voltage | AC100V/110V/240V, 50Hz/60Hz |
| Power consumption | 140VA |
| External dimensions | Width 459x Height 144x Depth 338 mm |
| Weight | 18.5kg |