SONY STR-6000
¥ 69,800 (around 1970?)
Commentary
A stereo receiver that concentrates the high performance of the ES series.
The amplifier has a maximum output of 130W and a continuous rated output of 50Wx2, so that it can be used for low-efficiency speakers such as the AR type that was popular at that time.
The front end of the FM tuner section is equipped with a frequency number line five series varicon, and the high-frequency amplifier stage and mixing stage are equipped with two FETs, providing high sensitivity and interference rejection capability.
The IF amplifier consists of a 6-element solid state filter and a 6-stage limiter circuit including a 3-stage symmetrical diode limiter.
The less frequently used knob is designed to be stored in the door, making it easy to use.
The selector is a lever type, and the commonly used Phono, Tuner and Aux switches can be switched with a single lever. This eliminates the need for multiple rotary switches.
A muting circuit using FET is installed in the tuner section to suppress inter-station noise during FM channel selection.
The AM tuner section is designed with attention paid to sensitivity and selection, such as a large 180 mm bar antenna and an IF amplifier using a solid state filter.
Equipped with a loudness function.
It is equipped with a walnut cabinet and has a luxurious design with black anodized aluminum panel and diamond cut knob.
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Model Rating
| Type | FM stereo / AM receiver |
| <Audio section> | |
| Dynamic Power | 130W (8 Ω, both channels operating) |
| Rated output | 50W + 50W (8 Ω) |
| Damping factor | 50 or More (8 Ω) |
| Cross modulation distortion factor | 0.2% or Less (Rated Output) 0.15% or Less (at 1W output) |
| Harmonic distortion factor (1 kHz) | 0.2% or Less (Rated Output) 0.1% or Less (at 1W Output) |
| Frequency characteristic | 20 Hz ~ 60 kHz + 0 -3dB |
| S/N | Phono : 70 dB or more Aux, Tape : 100 dB or more |
| Residual noise | 0.08 μ W or less |
| Tone control | Bass : ± 10 dB (100 Hz) Treble : ± 10 dB (10 kHz) |
| Loudness control (30 dB attenuation) | + 5 dB at 50 Hz, + 5 dB at 10 kHz |
| Input Sensitivity / Impedance | Phono : 2.1mV/47k Ω Aux, Tape : 180mV/100k Ω Rec/PB (input) : 180mV/100k Ω Tape Head : 1.5mV/200k Ω |
| Output Level / Impedance | Rec : 160mV/15k Ω Rec/PB (output) : 25mV/82k Ω Speaker : 4 Ω ~ 16 Ω, 2 systems Headphone : 8 Ω |
| FM Tuner Section | |
| Receiving frequency | 76 to 90 MHz |
| Practical sensitivity | 2.0 μ V (IHF) |
| S/N | 65dB |
| Capture ratio | 1.5dB |
| Selectivity | 80dB(IHF) |
| Image interference ratio | 90dB |
| Intermediate frequency interference ratio | 100dB |
| Spurious interference ratio | 100dB |
| AM suppression ratio | 50dB |
| Frequency characteristic | 20 Hz ~ 15 kHz + 0 -1dB |
| Distortion factor | mono:0.5% stereo:0.8% |
| Stereo separation | 38 dB or More (1 kHz) |
| Automatic stereo switching level | 5 μ V |
| 19 khz and 38 khz suppression ratio | 55dB |
| Antenna | 300 Ω Balanced Type 75 Ω Unbalanced Type |
| <AM Tuner Section> | |
| Receiving frequency | 530 to 1,605 kHz |
| Sensitivity | 44dB/m (bar antenna) 10 μ V (external antenna) |
| S/N | 50 db (at 5 mv input) |
| Image interference ratio | 43dB(1400kHz) |
| Intermediate frequency interference ratio | 38dB(1000kHz) |
| Distortion factor | 1.0% (at Input 5 mv) |
| Antenna | Ferrite bar antenna with external terminal |
| <General> | |
| Semiconductor used | Transistor : 60 FET : 3 Diode : 40 pcs |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power outlet | unswitched:300W |
| Power consumption | 130W |
| External dimensions | Width 473x Height 168x Depth 370 mm |
| Weight | 13.8kg |
| Accessories | One feeder antenna 2 Pin Plugs Four short plugs |