Kenwood Trio 9R-59DS are two slightly different versions of the same communications receiver manufactured by Trio (later Kenwood) Electronics in Japan during the years 1969-1974. The receiver is an 8-tube single-conversion design (455 kHz IF), covering from 0.55 to 30 MHz in four bands, and featuring a calibrated electrical bandspread for the ham bands.
The receiver provided an excellent value for its cost (105 $ in 1971), since it had good selectivity (ceramic IF filter) and stability and included a product detector for SSB reception. For those reasons it became very popular especially with SWLs in Europe and many good units are still available for sale, mainly in Germany.
| Type: | HF receiver |
| Frequency range: | A: 0.55 - 1.6 MHz B: 1.6 - 4.8 MHz C: 4.8 - 14.5 MHz D: 10.5 - 30 MHz |
| Mode: | AM/SSB/CW |
| Receiver system: | Single conversion superheterodyne IF: 455 KHz |
| Sensitivity: | Band A, B & C: <6 dB (10 dB S/N) Band D: <18 dB (13 MHz), <10 dB (28 MHz) |
| Selectivity: | 10 KHz (-50 dB) |
| Image rejection: | |
| Voltage: | Mains, 110-120 / 220-240 VAC |
| Power consumption: | 45 W |
| Impedance: | 50 ohms / SO-239 |
| Dimensions (W*H*D): | 381*178*254 mm (15*7*10") |
| Weight: | 8.53 Kg (18.81 lbs) |
| Manufactured: | Japan, 1968-1969 (Discontinued) |
| Other: | Bandspread on ham bands. ANL and AVC. Tubes |
| Related documents: | User manual (2 MB) Schematic (140 KB) |
| Modifications: |
Bands |
Tube complement |
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Dimensions and weight: 18 cm high, 38 cm wide, 26 cm deep. Weight 8 kg.
Power requirements: 220-240 and 110-120 VAC, 45 W. |
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