¥ 28,000 (around 1978)
A compact FM/AM tuner designed primarily to satisfy both audio equipment and communication equipment characteristics.
It uses twin color tuning, and the color of the illumination of the whole dial scale changes from white to green when tuning is achieved.
In the FM front-end section, a dual-gate MOS FET with a small NF is used in the high-frequency amplification stage to increase the sensitivity. In addition, the air-core coil and frequency number line type varicon improve the ability to eliminate various types of interference.
In addition, an air-core coil is used for the local oscillator, and the variable capacitor for local oscillation has a wide gap to maintain high frequency stability.
The FM and IF stages are composed of four linear phase ceramic filters with excellent phase characteristics and three differential amplifier stages, which provide a stable limiter and excellent phase characteristics.
A wide-band クォードラチュア detection circuit is adopted for the detection circuit, enabling low distortion rate reception.
In addition, the MPX circuit employs a PLL-type IF with excellent temperature characteristics, which provides excellent separation and distortion characteristics over a wide bandwidth.
The AM receiving circuit has an all-IC circuit configuration.
Equipped with signal meter and tuning meter.
|FM Tuner Section|
|Circuit system||Frequency Linear Type 3-Series Variable Capacitor
クォートラチュア detector circuit
|Practical sensitivity||1.9 μ V|
|Image interference ratio||60dB|
|IF interference ratio||80dB|
|Spurious interference ratio||80dB|
|AM suppression ratio||55dB|
|Harmonic distortion factor||mono:0.2%
|Frequency characteristic||30 Hz to 15 kHz ± 3 dB|
|<AM Tuner Section>|
|Circuit system||Double Variator|
|Practical sensitivity||150 μ V/m|
|Image interference ratio||40dB|
|IF interference ratio||50dB|
|Spurious interference ratio||40dB|
|Harmonic distortion factor||0.8%|
|Output Level / Impedance||150mV/5k Ω (30% modulation)|
|Pwer||100 VAC, 50Hz/60Hz|
|External dimensions||Width 270x Height 70x Depth 258 mm|
|Attachment||T-shaped FM antenna