Tabletop receivers by Kenwood, Trio Kenwood Electronic Inc.

The first shortwave receivers from Trio were in Europe also sold under the brands Jennen and Lafayette.

The shortwave receiver 9R-59DS, launched in 1968, soon became very popular, the shortwave receivers R-1000, R-2000 and R-5000 set standards. Among radio amateurs, the „Twins“ receiver R-599 / transmitter T-599 are still appreciated as oldies; a variety of amateur radio transceivers improved the reputation of Trio - Kenwood until today.

Around 1980 the brand name Kenwood was used more widely, in 1986 the company was renamed Kenwood Corporation and in 1996 the addition „Trio-“ was dropped altogether.

Trio-Kenwood / Kenwood Co. tabletop receivers

9R-59	approx. 1961	Single conversion	550 kHz - 30 MHz	AM / CW, analogue dial with bandspread on ham bands
9R-59DS	1969	Single conversion	550 kHz - 30 MHz	AM / CW, 4 kHz filter, analogue dial with bandspread on ham bands
R-599	1970	Double conversion	160 - 10m - Ham bands	AM / USB/LSB, FM; linear analogue display
QR-666	1974	Double conversion	170-410 & 550 kHz - 30 MHz	AM / CW, analogue dial with bandspread on ham bands
R-300	1976 - 1979	Double conversion	170-410 & 550 kHz - 30 MHz	AM / CW, analogue dial with bandspread on ham bands
R-820	1978	Double conversion	6 ham and 5 broadcast shortwave bands	AM / USB/LSB, digital display 0.1 kHz, PBT, notch, NB
R-600	1982	Triple conversion	500 kHz - 30 MHz	AM / USB/LSB, digital display 1 kHz; 6 / 2.7 kHz IF filters
R-1000	1979	Double conversion	200 kHz - 30 MHz	AM / USB/LSB, digital display 1 kHz; 12 / 6 / 2.7 kHz IF filters
R-2000	1983	Triple conversion	150 kHz - 30 MHz	AM / USB/LSB, FM, digital display 0.1 kHz; 6 / 2.7 kHz IF filters, 10 memories
R-5000	1987	Triple conversion	100 kHz - 30 MHz	AM / USB/LSB, FM, digital display 10 Hz; 6 / 2 kHz filter, PBT, notch, NB, 100 memories, direct frequency input