Analog Systems
- Helicorder® Model RV-301B
- Helicorder® Amplifier Model AR-320B
- Power Amplifier Model PA-200
- Compact Remote Station Model 45.50
- Seismic Amplifier Model 42.70/PF.70
- Voltage Controlled Oscillator Model 46.32
- Input/Output Module Model IO.40/IO.45
- Calibrator Model PC-120
- 19" Chassis Rack Mount Model 49.03
- Power Supply Model 48.11/48.31
- Discriminator Model 46.12
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| The Model PA-200 Power Amplifier is designed to provide 180 VA of precision frequency regulated power to the Helicorder® drive motors and other similar instruments. The unit requires a push-pull square wave drive source, which is obtained from a companion Geotech timing system and converts this signal into a nominal 115/220 Vac, 50/60 Hz square wave at its output. The input voltage range is 10 to 16 V dc and will provide 115/220 V ac output at 12.5 V dc input under full load conditions. The complete power requirements of up to seven single pen heat writing Helicorders® Model RV-301B, can be supported by the PA-200. The unit is designed to mount in a standard 19-inch rack and occupies 5.25 inches of vertical rack space. | |
