Specifications

2-3
SHORTED OUTPUT DETECTION
If the output of the amplifier becomes shorted, the indicator will turn
red and the amplifier will turn off the output stage for about 3 seconds,
then very briefly try to turn on again. If the short still exists, this cycle
will repeat until the short is removed.
THERMAL PROTECTION
A thermal protection circuit prevents high case temperatures which
are unpleasant to the touch and potentially harmful to the amplifier. The
thermal cutout circuit will mute the amplifier when the transistor cases
reach 85°C, and the indicator will turn red.
If this happens, more ventilation should be provided for the
amplifiers.
MAINTENANCE
No routine maintenance is required for the Boulder 850 Power
Amplifier. However, to keep operating temperatures at a minimum,
do not block the heat sink fins, and remove any dust buildup that may
occur.
OPERATION