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PI 4100 Medium Wave Field Strength Meter
520 kHz to 5.1 MHz
A third generation of precision survery instrumentation for direct measurement of the electromagnetic field strength.

SD-31 Frequency Synthesizer
A Synthesizer-Detector providing a high output crystal signal generator of precisely known frequency combined with a sensitive, selective detector for RF bridge measurements
of AM antenna impedance.

1900 Series
Digital Antenna Monitor

AM broadcast antenna control/measurement circuitry for up to 12 towers with digital display of all measurements, local operating controls, and an interface to remote controls.


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Legacy Products

Legacy Products
serviceable by Potomac Instruments

FIM-22, FIM-41
FIM-71, FIM-72A,
AA-51, AG-51