BGW 500D

Stereo Power Amplifier (1974)

Description

Unique design features incorporated into the Model 500D make it virtually fail-safe and free from accidental damage caused by human error in audio service.

A fast acting SCR (silicon controlled rectifier) crow bar is employed as a safeguard for your speakers.

The sophisticated sensing circuitry for the crow bar constantly samples the individual outputs of each channel.

The outputs of each channel are integrated and passed through an absolute value detector.

The output of the detector is connected to a comparator which is activated by the presence of a large DC component.

If such a value is present, the comparator in turn triggers a fast discharge pulse circuit which gates the SCR crow bar.

The crow bar is essentially a direct short placed across the two power supplies and this activates the circuit breaker.

Downloads

owners / service manual (en)

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The HiFi Engine website is not affiliated with or sponsored by BGW. If you wish to buy a 500D please contact the company via their website or visit an authorised retailer. BGW is a trademark of that company.