Dynaco Stereo 150 Power Amplifier

I got this picture from eBay auction Item #290673144.

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schematic pt. 1,
schematic pt. 2,
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Description:

Specifications:

Power Output Ratings: Less than 0.25% total harmonic distortion at any power level up to 75 watts continuous average power per channel into 8 ohms (40 watts per channel into 16 ohms, or 150 watts monophonically into 8 ohms) at any frequency between 20 Hz and 20 KHz with both channels driven. Distortion reduces at lower levels.

Available Power Output:

20 Hz to 20 KHz, both channels driven:

75 watts continuous average per channel @ 8 ohms;
100 watts continuous average per channel @ 4 ohms;
40 watts continuous average per channel @ 16 ohms.

Monophonically, 20 Hz to 20 KHz:

150 watts continuous average per channel @ 8 ohms;

Intermodulation Distortion: Less than 0.25% at any power level up to 75 watts rms per channel into 8 ohms with any combination of test frequencies. Distortion reduces at lower power levels. Power at Clipping, single channel, 2500 Hz, less than 1% distortion:

90 watts @ 8 ohms;
130 watts @ 4 ohms;
45 watts @ 16 ohms.

Half-power bandwidth: 37.5 watts per channel at less than 0.25% total harmonic distortion from 5 Hz to 40 KHz into 8 ohms.

Frequency Response: +0, -1 dB, 10 Hz to 40 KHz @ 1 watt into 8 ohms; ±0.5 dB, 20 Hz - 20 KHz @ 75 watts.

Hum and Noise: Greater than 95 dB below rated output, full spectrum.

Input: 35,000 ohm load; 1.0 volt for 75 watts @ 8 ohms.

Slewing Rate: 5 volts per microsecond.

Output Impedances: 4, 8, and 16 ohms each channel.

Damping Factor:

Greater than 80 to 1 KHz into 8 ohms;
Greater than 50 to 10 KHz into 8 ohms.

Channel Separation: Greater than 70 dB by IHF standards.

Connectors: Inputs: phono jacks. Outputs: Color coded 3-way binding posts with standard 3/4" spacing.

Dimensions: 14-1/2" wide, 13-3/4" deep, 6-5/8" high.

Weight: Shipping weight 34 lbs; Net weight 29 lbs.

Power Consumption: 60 VA quiescent; 5 amps maximum; 50/60 Hz, 120/240 VAC.

Designed by:

Harry Klaus

Year Introduced:

1975

Price:

$269.00 kit
$399.00 assembled

Comments:

A reduced-power version of the Stereo 400, featuring identical output power transistors and a roomy chassis which invited its own spate of circuitry upgrades. Later revived and reissued by Stereo Cost Cutters/Sound Values when they inherited the Dynaco parts inventory, until they officially ceased Dynaco support in the early 1990s.



This page created and maintained by Greg Dunn.
Copyright © 2000 Greg Dunn