Rugged power amplifier for audio and instrumentation.
Balanced or Single ended inputs.
100 Watt RMS.
Toroidal power transformer.
Large filter capacitance, up to 30,000uF .
1 or 2 amplifiers.
Heavy duty open frame construction.
Uses PM21 or PM324 modules.
High voltage amplifier version available (+/- 200V).
Dimensions 13" x 6" x 3".
Custom modifications available.
The PS125 power amplifier series provide high quality power
amplifier in an economical and rugged construction. The unit has a
toroidal power transformer and linear rectifier unit mounted in a
heavy duty aluminum chassis that acts as the heat sink for the
power amplifier. The PM324 module is a MOSFET single amplifier.
The PM21 is a dual integrated circuit amplifier. The
PS125 uses a heavy duty 160VA toroidal power transformer. The
PS125 is ideal for OEM applications, powered amplifiers, for
driving precision servo motors, instrumentation and so on. The
amplifiers are short circuit protected, and also have thermal
protection, making these units almost indestructible. Typical
power bandwidth of the amplifiers is DC to 25KHz. The amplifiers
all have differential inputs that can be used with a unbalanced or
balanced source. An internal jumper selects between AC or DC
coupling. Typical harmonic distortion is 0.01% or less. Typical
load capability of the amplifiers is 8 Ohm, but the amps are
stable with any load. For different load requirements consult
factory. The high voltage version can be ordered with an output
voltage range of up to +/- 200V; consult factory for details. For
example, the PS125HV-140-324 has max. output voltage of +/-170V
and is thus able to output up to 120VRMS.
Model Number Module RMS Power Output voltage swing Output current Remarks
Installed (peak-peak) limit
PS125-35-324 PM324 MOSFET 100 -45V - +45V 9A RMS For audio and general purpose use
PS125-40-324 PM324 MOSFET 100 -50V - +50V 9A RMS For audio and general purpose use
PS125-50-324 PM324 MOSFET 100 -70V - +70V 5A RMS For audio and general purpose use
PS125HV-120-324 PM324HV MOSFET 50 -150V - +150V 0.5A RMS High voltage amplifier
PS125HV-140-324 PM324HV MOSFET 50 -170V - +170V 0.4A RMS High voltage amplifier 120VRMS output
PS125-25-21 PM21 IC 50 + 50 -30V - +30V 6A RMS For audio and general purpose use
For more details on the amplifier sections see the pages on the PM21 or PM324
Ask us about custom modifications. We may be able to customize this amplifier to your needs. For example: custom gain setting, custom output voltage range.