Technics ST-G900
※ Order limited item
¥ 100,000 (around 1991)
Commentary
FM/AM tuner with twin RF & IF configuration.
A twin RF circuit of normal and super narrow is mounted on the front end part. The microcomputer detects the presence or absence of a broadcasting station causing interference in the upper and lower range of the reception frequency (0.5 MHz to 2.5 MHz) and automatically switches it.
An automatic switching system has also been adopted for the IF (intermediate frequency) band. When there is strong disturbance, the system automatically switches to super narrow, which gives priority to sensitivity, and when there is no disturbance, to normal, which gives priority to sound quality.
Equipped with rotary tuning knob that can be operated with analog sense.
The operability is improved by installing auto-scan tuning and auto-memory function.
A twin-quartz & DC configuration is adopted that maintains stable tuning accuracy even when radio wave conditions change.
Class AA circuit is adopted for the output post-amplifier. By sharing voltage amplification and current drive with a dedicated circuit, the effect of load fluctuation is suppressed and high-quality transmission is achieved.
A vibration-proof top plate and a gold-plated RCA pin terminal are used to improve sound quality.
Equipped with REC level check signal output.
Equipped with an FM signal intensity display.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Receiving frequency band | 76.1 mhz to 89.9 mhz |
| Practical sensitivity | 10.3 dBf (0.9 μ V, IHF' 78) |
| S/N ratio 50 dB sensitivity | Mono : 18.1 dBf (2.2 μ V, IHF' 78) Stereo : 38.1 dBf (22 μ V, IHF' 78) |
| Dynamic range | 112dB |
| Total harmonic distortion factor | 0.009%(mono) 0.015%(stereo) |
| Frequency characteristic | 4 hz to 18 khz + 0. 2-0. 5 db |
| Leak Carrier (19 khz) | -70dB |
| <AM Tuner Section> | |
| Receiving frequency band | 522 kHz to 1629 kHz |
| Practical Sensitivity (S/N ratio 20 db) | 20 μ V, 290 μ V/m |
| Effective selectivity | 50 dB (± 9 kHz) |
| Image interference ratio (999 kHz) | 40dB |
| IF interference ratio (999 kHz) | 60dB |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 9W |
| External dimensions | Width 483x Height 97x Depth 282 mm |
| Weight | 4.3kg |