Bits of WJ Gaithersburg History
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Communication Electronics, Inc (CEI)

Where the surveillance receiver division of Watkins-Johnson started.

Nems-Clarke has a long history in radio going back to at least 1909. Most of their product line was telemetry receivers for early satellite and missile reception.

Regco - started by a former CEI employee, Ralph Grimm. Very scarce equipment probably produced in small numbers.

Ling Temco Voight (LTV) made airplanes and purchased custom CEI, WJ Nems-Clarke and Collins radio for airborne surveillance use. They became E-Systems and continued to use WJ radios under the new name.

RS-111 front

The RS-111 receiver - Probably the most famous surveillance radio ever made because its role in the Watergate wiretapping.