Technics ST-5
¥ 37,800 (released in 1982)
Commentary
A quartz synthesizer tuner that condenses Technics technology into a 315 mm jacket size.
Sound quality is improved by setting the reference frequency to 25 kHz, which is outside the range of audibility range.
The synthesizer employs a swallow in counter system to prevent spurious interference from occurring in the broadcast band and to ensure more faithful waveform transmission.
The double-switching PLL MPX circuit realizes high-precision stereo demodulation.
A total of 16 FM/AM random access memories are installed.
Each of the 8 buttons can be used either on the front or on the back, allowing you to randomly preset 16 stations regardless of whether they are FM or AM.
Manual / auto-scan tuning is possible.
Each time the tuning button is pressed one push, the frequency changes in steps of 100 kHz for FM and 9 kHz for AM. When the button is pressed continuously (for 0.4 or more), the operation shifts to high-speed up/down operation. When the button is released, auto-scan is started, the nearest station is found, and tuning / stopping is performed.
It is equipped with an auto memory function that enables you to set a preset by pressing the memory button.
Equipped with an FL display that digitally displays the channel number.
In addition to the digital display, an analog meter is also installed for the frequency display.
Equipped with an AM loop antenna, it is designed to resist external noise.
It uses a unique direct connector.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Receiving frequency | 76.1 mhz to 89.9 mhz |
| Practical sensitivity | 10.3 dBf (0.9 μ V, IHF' 58) |
| SN ratio 50 dB sensitivity | Mono : 18.5 dBf (2.3 μ V, IHF' 58) Stereo : 38.9 dBf (24 μ V, IHF' 58) |
| Distortion factor | mono:0.08% stereo:0.15% |
| Signal-to-noise ratio | mono:78dB |
| Frequency characteristic | 20 Hz ~ 15 kHz + 0.5 -1.5 dB |
| Effective selectivity | 65 dB (± 400 kHz) |
| Capture ratio | 1.0dB |
| Image interference ratio | 63dB |
| IF interference ratio | 100dB |
| Spurious interference ratio | 85dB |
| AM suppression ratio | 55dB |
| Stereo separation | 40dB(1kHz) |
| Leak carrier | -35dB |
| <AM Tuner Section> | |
| Receiving frequency | 522 kHz to 1611 kHz |
| Sensitivity (SN ratio 20 dB) | 20 μ V, 300 μ V/m |
| Selectivity | 55dB |
| Image interference ratio (999 kHz) | 40dB |
| <General> | |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 9W |
| External dimensions | Width 315x Height 50x Depth 244 mm |
| Weight | 1.9kg |