Technics ST-GT550
¥ 32,800 (around 1994)
Commentary
FM/AM tuner for AM stereo.
Equipped with an auto IF selector to quickly respond to changes in radio wave conditions.
This function automatically narrows the IF band to give priority to sensitivity when disturbance is strong, and automatically switches the IF band to give priority to sound quality when there is no disturbance.
A Local/DX switching circuit is used to attenuate radio waves at the antenna input.
This prevents the front end of the tuner from becoming saturated in areas where strong radio waves are received, such as near transmission stations, and ensures stable FM reception.
Class AA circuit is mounted in the audio output amplifier section.
Equipped with 2 dB step FM signal strength display function.
AM stereo is supported.
Wireless remote control is included.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Receiving frequency band | 76.0 MHz to 90.0 MHz (in 0.1 MHz steps) |
| Practical sensitivity | 14.8dBf |
| S/N ratio 50 dB sensitivity | mono:18.1dBf stereo:39.2dBf |
| Signal-to-noise ratio | mono:78dB stereo:72dB |
| Total harmonic distortion factor | mono:0.15%(normal) stereo:0.2%(normal) |
| Frequency characteristic | 10 Hz ~ 15 kHz + 0.5 -1.0 dB |
| Effective selectivity | Normal : 70 dB (± 400 kH) Super narrow : 25 dB (± 200 kHz) |
| Capture ratio | 1.2dB |
| Image Interference Ratio (83 mhz) | 50dB |
| IF Interference Ratio (83 MHz) | 60dB |
| AM suppression | 55dB |
| Stereo separation | 45dB(1kHz) |
| Leak carrier | -68dB |
| Antenna terminal | 75 Ω (Unbalanced Type) |
| <AM Tuner Section> | |
| Receiving frequency band | 522 kHz to 1629 kHz (9 kHz step) |
| Practical Sensitivity (S/N ratio 20 db) | 20 μ V, 600 μ V/m |
| Effective selectivity | 40 dB (± 9 kHz) |
| Image interference ratio (999 kHz) | 40dB |
| IF interference ratio (999 kHz) | 50dB |
| Stereo separation | 20dB(1kHz) |
| <General> | |
| Output voltage | 0.6V |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 9W 2.5W (Power Off) |
| External dimensions | Width 430x Height 92x Depth 308 mm |
| Weight | 2.9kg |
| Attachment | Wireless Remote Control |