Model 2221 Power Supply
The Model 2221 provides the highly stable DC
polarization voltage required by precision microphones along
with low noise amplification enabling it to drive input and
output cables as long as 500 feet. It is rugged, lightweight
and will provide up to forty hours of continuous operation
(with PRM902 Microphone Preamplifier) using six AA internal
batteries. It can also provide sufficient current to power
the PRM903 Microphone Preamplifier, which has an internal
heater.
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Powering precision microphones and
preamplifiers
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Signal conditioning and amplification for
use with recorders, data loggers, and
frequency analyzers
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Internal battery power with low power
consumption
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0 and 200 volt polarization voltage
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Selectable Flat (Z), A, and C- weighting
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0 to 50 dB gain
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Both instantaneous and latching overload
indicators
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LED indicators for output signal, internal
battery voltage, and
external power
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Drives long cables (500 foot), input and
output
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High preamplifier current capability to
drive Larson Davis
PRM903 preamplifier with internal heater
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Compatible with ICP powered transducers
(using PRA951
adaptor)
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Recalls last active setup upon power-up
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