Technics SA-4200
¥ 45,000 (around 1973)
Commentary
An FM/AM stereo receiver that uses an all-stage direct-coupled differential amplification OCL circuit in the audio section.
Electronic transistor protection circuit is adopted.
Low-noise PNP silicon transistors are used for all stages of the preamplifier and the first stage of the power amplifier.
The FM tuner uses a 4-stage IF low-noise FET.
It also automatically switches between FM stereo and mono.
.JPG)
Model Rating
| Type | FM/AM stereo receiver |
| Amplifier Unit | |
| Music Power (IHF) | 30W (4 Ω) 20W (8 Ω) |
| Effective power (IHF) | 8W/8W (8 Ω) |
| Power band wiz | 10 Hz to 50 kHz -3dB |
| Frequency characteristic | 15 Hz to 100 kHz ± 3 dB |
| Total harmonic distortion factor | 0.8% or Less (Rated Output) |
| Intermodulation distortion factor (60 Hz : 7 kHz = 4 : 1 at effective output) | Not more than 1.2% |
| Damping factor | 30 or More (8 Ω Load) |
| Input Sensitivity / Impedance | Phono : 2.5mV/50k Ω Ceramic : 20mV/25k Ω AUX : 150mV/65k Ω |
| Tape monitor | Rec Out:150mV Playback : 150mV/65k Ω |
| Tone control | Bass : 50 Hz, ± 10 dB Treble : 10 kHz, ± 10 dB |
| Loudness control | 100 Hz, + 5 dB 10 kHz, + 5 dB |
| <FM Part> | |
| Receiving frequency | 76 MHz to 90 MHz |
| Sensitivity (IHF) | 4 μ V |
| Selectivity (IHF) | 40dB |
| Signal-to-noise ratio (IHF) | 60dB |
| Capture ratio | 3dB |
| Image interference ratio | 47dB(84MHz) |
| IF interference ratio | 70dB |
| Spurious interference ratio | 65dB(84MHz) |
| AM suppression ratio | 38dB |
| Stereo separation | 35dB(1kHz) |
| Total harmonic distortion factor | 1.5% or less (400 Hz, 100% modulation) |
| <General> | |
| Semiconductor used | FET : 1 Transistor : 37 Diode : 31 Units |
| Pwer | 100 VAC, 50/60Hz |
| Power consumption | 50W |
| External dimensions | Width 417x Height 120x Depth 300 mm |
| Weight | 7kg |