5
INTRODUCTION
The
B+K Precision
Model 1686 is a high quality 3 to 14 Volt
DC Power Supply primarily designed for bench powering of
automotive and marine electronic equipment. The Model 1686
has a maximum output current proportional to the voltage setting,
the maximum current of 12 amps available from 13.8 to 14 volts
and is reduced to 2.5 amps at 3 volts. Two panel mounted meters
continuously monitor the output voltage and current.
The 12-amp output of the Model 1686 power supply allows
bench powering of most any car radio, sound system (including
most “high-power” car stereo receiver/amplifiers), tape systems,
PA systems, and low-to-medium power 2-way radios, such as CB
transceivers, VHF/UHF commercial equipment, marine, car
telephone, and 2-meter transceivers.
The power supply utilizes thermostatically controlled fan
cooling for improved heat dissipation and reliability while
keeping bulk and weight to a minimum.
Foldback current limiting protects the power supply from
accidental short circuits and overload conditions. The output is
isolated from chassis and earth ground, permitting full
flexibility of connections. When desired, the positive (+) or
negative (–) polarity outputs may be strapped to ground,
allowing use with negative-ground and positive-ground
automotive equipment.
Advanced design, quality, and sturdy construction of the
Model 1686 assures continued reliability. To gain the most
effective use of this instrument, we recommend that you study
the entire manual before operating the power supply.
