SONY ST-5150D
¥ 49,800 (around 1975)
Commentary
FM/AM tuner using junction FET and 4-row varicon.
The high-frequency amplifier circuit consists of a newly developed junction FET and a four link varicon, a stable local oscillator circuit and an FET mixer circuit.
A 2-element solid-state filter is used for the intermediate frequency amplifier circuit, and accuracy is improved by the use of IC.
The MPX circuit employs a high-integration IC and a newly developed coil unit exclusively for IC.
The AM tuner uses a triple tune IFT including a high-integration IC solid-state filter.
Large dial and regular interval scale are adopted.
The low-pass filter allows recording without carrier leak or beat.
Equipped with an output terminal that can check multipath.
Equipped with a multi-path switch that changes the signal meter to a multi-path indicator.
In preparation for FM4-channel broadcasting, an FM discriminator output terminal is mounted.
Equipped with a dedicated terminal for 75 Ω coaxial connector.
Equipped with a high blend circuit.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Antenna terminal | 300 Ω Balanced Type 75 Ω unbalanced type (coaxial cable connector) |
| Practical sensitivity | 2.0 μ V (IHF standard) |
| Sensitivity | 1.6 μ V (SN ratio = 30 dB) |
| Signal-to-noise ratio | 70dB |
| Capture ratio | 1.0dB |
| Selectivity | 70dB(IHF) |
| Image interference ratio | 75dB |
| IF interference ratio | 90dB |
| Spurious interference ratio | 90dB |
| AM suppression ratio | 56dB(IHF) |
| Frequency characteristic | 20 Hz to 15 kHz ± 1 dB |
| Distortion factor | Mono : 0.3% at 400 Hz, 100% modulation Stereo : 0.5% at 400 Hz with Main 45% Sub 45% Pilot 10% modulation |
| FM stereo separation | 40 dB or More (400 Hz) |
| 19 khz and 38 khz suppression ratio | 50dB |
| Output Voltage / Impedance | Fixed Output : 750mV/10k Ω Variable Output : 0 ~ 2V/1.8k Ω Multipath output Vertical : 150mV/10k Ω Horizontal : 150mV/100k Ω FM Discri out : 200mV/3k Ω |
| <AM Tuner Section> | |
| Antenna | Ferrite bar antenna With External Antenna Terminal |
| Sensitivity | 50dB/m (when bar antenna is used) 30 μ V (when external antenna is used) |
| Signal-to-noise ratio | 50dB |
| Image interference ratio | 45dB(1,000kHz) |
| Distortion factor | 0.6% |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 15W |
| External dimensions | Width 400x Height 149x Depth 344 mm |
| Weight | 7.0kg |