Technics ST-3600
¥ 58,000 (around 1973)
Commentary
FM/AM tuner designed to enjoy sound quality suitable for the era of full-scale FM broadcasting.
A 2-meter system is adopted.
The Distortion Null meter, similar to the Distortion Rate Meter, indicates the minimum distortion point only when the full tuning point is reached regardless of whether the input is large or small. This makes it easy to select the full tuning point (minimum distortion point).
The FM dial uses a newly developed frequency number line type varicon. The frequency scale is equally spaced, making it easy to read and adjust.
The front end uses high-frequency two stage amplification. The first stage is connected with a cord to lend two FETs, and the second stage uses a 4-pole MOS FET to bring out the advantages of each.
Combined with the high selectivity characteristics of the 4-row varicon, it shows good interference rejection capability.
In the intermediate frequency amplifier circuit, two crystal filters are used to improve the characteristics of the selectivity curve, and sufficient gain and limiter characteristics are obtained by the 6-stage amplification configuration (of which five stages are differential amplification with excellent limiter characteristics).
A monolithic IC is used for this intermediate frequency amplification to stabilize the gain.
Built-in movable ferrite antenna.
A muting circuit is mounted to suppress inter-station noise.
Uses MPX High Blend Switch.
.JPG)
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Sensitivity (IHF) | 1.7 μ V |
| Selectivity (IHF) | 65 dB or more |
| Image ratio | 90 dB or more (83 MHz) |
| IF interference ratio | 100 dB or More (83 MHz) |
| Capture ratio | 1.5 dB or less |
| AM suppression ratio | 50 dB or more |
| Stereo separation | 40dB(1kHz) 25dB(10kHz) |
| I-harmonic distortion factor (100% modulation, 400 Hz) | mono:0.3% stereo:0.5% |
| SN ratio (IHF, 100% modulation) | mono:70dB |
| Frequency characteristic | 30 Hz to 13,000 Hz ± 0.5 dB |
| Antenna | 300 Ω equilibrium 75 Ω unbalance |
| <AM Tuner Section> | |
| Receiving frequency | 525 kHz to 1605 kHz |
| Sensitivity (IHF) | 10 μ V |
| Selectivity | 35dB |
| Image Ratio (1000 kHz) | 90dB |
| IF Disturbance Ratio (1000 kHz) | 60dB |
| Harmonic distortion factor (30% modulation, 400 Hz) | 1% |
| SN ratio (30% modulation) | 50dB |
| Antenna | Ferrite bar antenna External antenna terminal |
| <General> | |
| Functions | Program Selector : FM mono/FM Auto/AM FM stereo eye Signal meter Distortion null meter FM muting MPX High Blend Switch Tape recording terminal Low-impedance output circuit |
| Semiconductor used | IC : 1 FET : 3 Transistor : 27 Diode : 30 pcs |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 15W |
| External dimensions | Width 420x Height 150x Depth 375 mm |
| Weight | 9.5kg |