SONY ST-4950
¥ 69,800 (around 1976)
Commentary
ES-II series FM/AM tuner developed based on technological accumulation since ST-5000F.
In order to improve the accuracy of the varicon, the local oscillator inside the varicon adjusts and manages the rotation angle of the rotary to improve the reception accuracy.
In the front-end section, MOS FET is used for RF section and mixer stage.
Uniphase filter is adopted to achieve both high selectivity and low distortion rate.
A PLL IC is used in the MPX section.
Equipped with LED dial indicators and multi-pass indicators.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| FM Practical Sensitivity (IHF) | 1.9 μ V |
| Signal-to-noise ratio | stereo:70dB mono:75dB |
| Capture ratio | 1.0dB |
| Selectivity (IF) | 80dB |
| Image interference ratio | 75dB |
| IF interference ratio | 100dB |
| Spurious interference ratio | 100dB |
| Distortion factor | Mono : 0.15% at 400 Hz with 100% modulation Stereo : 0.3% at 400 Hz with Main 45% Sub 45% Pilot 10% modulation |
| Stereo separation | 400 Hz : 45 dB or more 1 kHz : 45 dB or more |
| <AM Tuner Section> | |
| Sensitivity (when bar antenna is used) | 48dB/m |
| Signal-to-noise ratio | 50dB |
| <General> | |
| Power consumption | 19W |
| External dimensions | Width 430x Height 170x Depth 335 mm |
| Weight | 7.7kg |
| Sold Separately | Sidewood TAC-15 (1 Set, ¥ 2,800) |