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überarbeitet am 2.11.2010
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Watkins Johnson has been founded in 1957 and produced not only electronic
components but also very high grade communications equipment. Many of these
receivers have been used by military or official surveillance services.
Probably after 1998, Watkins-Johnson has been taken over by Marconi and later
by BAE SYSTEMS North America (a branch of British Aerospace); in 2002 the
Gaithersburg plant has been sold to Integrated Defense Technologies IDT and
in November 2003 taken over by DRS Electronic Systems Inc.
Watkins Johnson equipment has mainly be used by the Services and Military
services, there has been only one shortwave receiver marketed directly to amateur
radio enthousiasts and semiprofessional users, the HF-1000 in 1993.
373A-2:(1966)
Surveillance receiver, triple conversion, ZF 60, 21,4 MHz, 455 kHz
0,5 - 30 MHz, linear analog dial; AM, CW, FM |
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521A-3:(ca. 1970)
VHF surveillance receiver, SW / VHF
20 - 80 MHz, analog dial and optional digital frequency display using Nixie tubes
DRO-290A-1; AM, CW, FM; integrated panoramic display |
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WJ-8888 / "Quad8":(1972)
triple conversion, ZF 82,8, 10,7 MHz, 455 kHz
0,5 - 30 MHz, digital frequency readout; AM, CW, USB, LSB, ISB, FM; 4 memories |
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WJ-8888 B:(1976)
identical technical specifications, 4 switchable tuning speeds |
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WJ-8718A: (1982)
double conversion,
5 - 30000 kHz; AM, CW, FM |
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| WJ-8718 A / MFP: (1986)
identical technical specifications, microprocessor controlled |
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WJ-8711 / WJ-8711 A: (1990)
double conversion,
5 - 30000 kHz; AM, CW, LSB, USB, ISB, FM;
DSP IF, AGCx2, RS 232 - Port |
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HF-1000: (1993)
double conversion,
5 - 30000 kHz; AM, CW, LSB, USB, ISB, FM;
DSP IF, two AGC speeds, RS 232 interface;
semiprofessional receiver. |
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