Lo-D SMR-5240
¥ 89,800 (released in 1974)
Commentary
A 4-channel stereo receiver developed using semiconductor and circuit technologies.
Built-in regular matrix (RM) and SQ matrix circuits.
The 4-channel power amplifier section consists of a quasi complimentary service OCL circuit.
The BTL connection allows the power amplifier to play back a sound with a margin when two channels are used.
The FM tuner uses a MOS-FET in the front end to achieve stable reception with low noise and reduced interference. The intermediate frequency amplifier uses a mechanical filter and IC with sharp performance.
A switching system is adopted for the MPX circuit.
Equipped with a pair microphone mixing circuit.
Model Rating
Type | 2ch/4ch Receiver |
Power Amplifier Unit | |
Effective power | 4 ch : 10Wx4 (8 Ω, 1 kHz) 2ch:25W+25W |
Dynamic Power (IHF) | 4 ch : 65W (8 Ω) 2 ch : 75W (8 Ω) |
Total harmonic distortion factor | 1% (at rated output) 0.2% at rated output of -3dB |
Cross modulation distortion factor | 0.5% (at 1/2 rated output) |
Output bandwidth | 20 Hz to 30 kHz |
Frequency characteristic | 20 Hz to 20 kHz ± 1 dB |
Damping factor | 25 (1 kHz, 8 Ω) |
Preamplifier Section | |
Input sensitivity | Phono : 3 mv (2 ch), 200 mv (4 ch) Aux, Tape : 200 mv Mic:3.5mV |
Tone control | Bass:+11dB -16dB(100Hz) Treble : ± 13 dB (10 kHz) |
S/N | Phono:60dB Aux:70dB |
FM Tuner Section | |
Receiving frequency | 76 MHz to 90 MHz |
Practical sensitivity (IHF) | 2 μ V |
Capture ratio | 1.2dB |
Selectivity | 46dB |
S/N | 64dB |
Harmonic distortion factor | mono:0.3% stereo:0.8% |
Stereo separation | 38dB(1kHz) |
<AM Tuner Section> | |
Receiving frequency | 530 kHz to 1,605 kHz |
Practical sensitivity (IHF) | 20 μ V |
Selectivity | 35dB |
S/N | 46dB |
<General> | |
Semiconductor used | Transistor : 57 FET : 1 IC : 3 Diode : 24 units |
Power supply voltage | 100 VAC, 50Hz/60Hz |
Rated power consumption | 75W (Electrical Appliance and Material Control Law) |
External dimensions | Width 490x Height 136x Depth 390 mm |
Weight | 9.6kg |