YAMAHA CT-400
¥ 40,000 (around 1976)
Commentary
FM/AM tuner with a simple circuit structure.
A low-noise junction FET is used for the front end to improve the image interference ratio and spurious interference ratio.
The IF stage is equipped with a high-gain IC differential amplifier composed of a constant current bias circuit and a 6-element ceramic filter. Excellent characteristics are obtained by checking the phase characteristics using Yamaha's original differential gain direct-viewing method.
The MPX circuit uses an IC-based double balanced differential demodulation circuit.
Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Receive Sensitivity (IHF, 84 MHz) | 2.0 μ V |
| Image interference ratio (84 MHz) | 55dB |
| IF Interference Ratio (84 MHz) | 75dB |
| Spurious interference ratio (84 MHz) | 75dB |
| Capture ratio | 1.5dB |
| Effective selectivity (IHF) | 75dB |
| Signal-to-noise ratio | mono:70dB stereo:66dB |
| Total harmonic distortion rate (400 Hz) | mono:0.3% stereo:0.5% |
| Stereo separation | 40dB(400Hz) |
| Frequency characteristic | 20 Hz ~ 14 kHz + 1.5 -3dB |
| Subcarrier suppression ratio | 40dB |
| <AM Tuner Section> | |
| Receiver sensitivity (IHF, bar antenna) | 52dB/m |
| Selectivity (1000 kHz) | 25dB |
| <General> | |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | 2.6W |
| External dimensions | Width 436x Height 144x Depth 300 mm |
| Weight | 5.0kg |