YAMAHA CR-1000 (1974) | Strong & Clear

 

The CR-1000 was a top-of-the-line FM receiver from Yamaha, introduced in 1974. The main amplifier circuit uses a pure complimentary service OCL system directly connected to all stages using two differential amplifiers. A large power transformer with good regulation is used for the power circuit. Power transistors and drive transistors that require a large current are supplied with voltage from a rectifier circuit that uses a large capacity capacitor of 10,000 μ Fx2 and a rectifier diode with a sufficient surge current of 250A. All other circuits are driven by a constant-voltage power supply circuit, enabling stable operation. Built-in 2-stage protection circuit for power transistor and speaker. The power transistor protection employs a limiter method that detects when the ASO (safe operating area) is exceeded and limits the input. Even when the protection circuit is activated due to overload or other reasons, the output only decreases and playback is not interrupted. Main characteristics: High-sensitivity FM input stage with dual MOS field-effect transistors and frequency-linear five-way tuning variable capacitor | IF amplifier with integrated circuit, seven-stage differential amplifier, and six ceramic filters | Exclusive to YAMAHA: Multiplex demodulator with negative feedback in the transistor circuit | YAMAHA Auto-Touch Tuning | LED display for mains, AFC/station, and stereo reception | Indicators for signal/field strength and center tuning | Continuously adjustable, dual-action FM noise reduction | Direct-coupled phono equalizer | Three-stage, directly coupled, low-noise tone controls and filter amplifier with extremely low harmonic distortion | Continuously adjustable aurally accurate volume correction | Separate microphone amplifier for microphone fade-in | Connection for two tape recorders With circuitry for tape-to-tape copying | Separable preamplifier and power amplifier | Two phono inputs, one of which has an impedance selector (30/50/100 kOhm) | IF output for quadrophonic demodulator | Multipath output for precise antenna alignment using an oscilloscope | Connection for two speaker groups | Logical and user-friendly arrangement of the controls on the front panel | Built-in protection circuit for power transistors and speakers | Headphone connection on the front panel | Power output 70+70W 8ohm | Dynamic power 200W | THD 0,04% | Dimensions (WxHxD) 510x147x335mm | Weight 19kg | Original sale price in Germany 2100 DM

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