Dynaco SCA-50 Stereo Control Amplifier Component Info

Dynaco SCA-50 Stereo Control Amplifier

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Description:

Specifications:

Rated Power Output: 25 watts continuous average power per channel into 8 ohms, 20-20,000 Hz, at less than 0.25% total harmonic distortion. Distortion decreases at lower power levels.

Power at Clipping, Single Channel, 1000 Hz, less than 1% distortion:

35 watts @ 8 ohms;
35 watts @ 4 ohms;
20 watts @ 16 ohms.

Intermodulation Distortion: Less than 0.1% at any power level up to 25 watts rms per channel into 8 ohms with any combination of test frequencies. Distortion decreases at lower power levels.

Frequency Response:

Phono: ±1 dB of RIAA curve @ 1 watt into 8 ohms.
High Level: ±0.5 dB, 15 Hz to 45 KHz @ 1 watt into 8 ohms.

Hum and Noise:

Phono: 72 dB below a 10 mV input (Ref: 1 KHz).
High Level: 89 dB below a 0.5 V input.

Input Sensitivity:

Phono: 1.65 mV for 25 watts output.
High Level: 125 mV for 25 watts output.

Phono Input Overload: 100 mV @ 1000 Hz.

Tone Controls:

±10 dB @ 50 Hz.
±10 dB @ 15 KHz.

Impedances:

Magnetic Phono: 47,000 ohms.
High Level: 50,000 ohms.
Tape Output:
From Phono inputs, 10,000 ohms minimum load.
From High Level inputs, same as source.

Headphone Output: 4 ohms or greater.

Separation: 60 dB @ 1000 Hz minimum; 40 dB @ 10,000 Hz.

Semiconductor Complement: 17 transistors, 2 integrated circuits, 2 FETs, 24 diodes.

Dimensions: 13-1/2" wide x 12" deep x 4-1/4" high.

Shipping Weight: 15 lbs.

Power Consumption: 20 watts quiescent; 240 watts maximum; 50/60 Hz, 120 or 240 VAC.

Richard Pley, Harry Klaus

Year Introduced:

1977

Comments:

A pared-down ST-150 type power amp (25 watts per channel) with all-IC preamp circuitry and sophisticated automatic power-on/off muting in a SCA-80 sized single chassis. Includes tone control defeat switch.