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überarbeitet am 5.7.2010
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The Japanese Trio Company started in the middle of the fifties with the
production of shortwave receivers aimed at the home and amateur radio market,
these sets have also been marketed under the labels of Lafayette and Jennen.
The 9R-59 - identical to the Lafayette HE-30 and similar to other Lafayette models
appeared in 1961 and was replaced by the very popular 9R-59D,
this single conversion receiver with a mechanical IF filter and bandspread tuning
hada very coarse dial calibration on shortwaves but was very much appreciated amongst
mediumwave DXers.
The all wave receivers QR-666 and the similar
R-300 with it's improved design were solid state
sets with analog dials and bandspread on ham bands, their stability and sensitivity
did not reach the marks set by the earlier 9R-59D.
The high end receiver R-820 featured a digital frequency display as well as an
accurate analog dial, passband tuning and a IF notch filter, it covers the amateur
and only a selection of general broadcast bands, but no out of band frequencies.
The definity breakthrough in the shortwave receiver market was Kenwoods famous
R-1000, a synthesized double conversion receiver
covering the entire shortwave band. In 1982/3, Kenwood came up with another two
similar receivers, the more basic R-600 and the
R-2000 with direct frequency input and memory functions. The R-5000
from 1987 was Kenwood's top-of-the-range set for quite a while.
The broadband / scanner set RZ-1 covering all frequencies from 500 kHz up to 905 MHz
in the size of a car radio hat a disappointing shortwave performance.
Desktop Receivers
| 9R-59:
single conversion, 550 kHz - 30 MHz, AM / CW,
analog dial with bandspread in amateur radio bands |
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| 9R-59D:
single conversion, 550 kHz - 30 MHz, AM / CW, 4 kHz-
audio filter, analog dial with bandspread in amateur radio bands |
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| R-599:
double conversion, 160 - 10m - Ham bands, AM / USB/LSB,
FM, linear analog dial |
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| QR-666:
double conversion, 170-410 & 550kHz - 30MHz, AM /
CW, analog dial with bandspread in amateur radio bands,
antenna tuner |
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R-300:(1976 - 79)
double conversion, 170-410 & 550 kHz - 30 MHz, AM /
CW, analog dial with bandspread in amateur radio bands,
antenna tuner |
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| R-820:
double conversion, 6 Afu- und 5 BC-Bänder, AM / USB/LSB,
digital frequency display 0,1 kHz, PBT, Notch, Noise Blanker |
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| R-600:
triple conversion, 500 kHz - 30 MHz, AM / USB/LSB,
digital frequency display 1 kHz, 6 / 2,7 kHz IF filters |
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| R-1000:
double conversion, 200 kHz - 30 MHz, AM / USB/LSB,
digital frequency display 1 kHz, 12 / 6 / 2,7 kHz IF filters |
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| R-2000:
triple conversion, 150 kHz - 30 MHz, AM / USB/LSB, FM,
digital frequency display 0,1 kHz, 6 / 2,7 kHz IF filters, 10
memories |
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| R-5000 (1987):
triple conversion, 100 kHz - 30 MHz, AM / USB/LSB, FM,
digital frequency display 10 Hz, 6 / 2 kHz IF filters, PBT,
Notch, NB, 100 memories, direct frequency input keypad |
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Wide band - Receivers
| RZ-1:
triple conversion, 500 kHz - 905 MHz, AM / USB/LSB,
FM n/w, digital frequency display 5 kHz, 100 memories |
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