TRIO KR-170
¥ 86,000 (around 1969)
Commentary
This top-of-the-line receiver was developed using the technology of Trio.
All silicon transistor configuration is used for the amplifier section.
The イコイラザーアンプ section uses a direct-coupled three stage amplifier circuit with an emitter-follower output stage.
Equipped with a pure electronic automatic return power transistor protection circuit.
The FM front-end of the tuner section uses RF2-stage amplification with 4-series variable capacitor and three carefully selected low-noise FETs to improve crosstalk problems such as cross modulation and image ratio.
In addition, four ICs are used in the intermediate frequency amplifier stage to provide sufficient IF gain and high sensitivity. In addition, the limiter works from the time of Tsutomu Oire to enable reception with less distortion.
Uses a Luminous dial that turns on when the switch is turned on.
It is also equipped with a muting switch that cuts out inter-station noise during channel selection.
Antenna terminals of 300 Ω and 75 Ω are mounted.
Pre-out and main in terminals are mounted.
It also has a 5P recording and playback connector terminal and a tape monitor switch.
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Model Rating
| Type | AM/FM stereo amplifier |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Sensitivity (IHF standard) | 1.5 μ V (84 MHz) |
| Image ratio | 100 dB or More (84 MHz) |
| IF interference ratio | 100 dB or More (84 MHz) |
| Signal-to-noise ratio | 70 dB or More (100% Modulation, 100 μ V Input) |
| Cross-modulation | 100 dB or more |
| Distortion factor | 0.5% or less (400 Hz, 100% modulation) |
| Frequency characteristic | 20 Hz ~ 20 kHz + 0 -2dB |
| Frequency drift | Not more than 0.02% |
| Antenna input impedance | 300 Ω balanced, 75 Ω |
| Channel separation | 38dB(400Hz) |
| FM multi-distortion factor | Not more than 0.7% |
| Carrier leak | -45dB or less |
| <AM Tuner Section> | |
| Receiving frequency | 520 kHz to 1610 kHz |
| Sensitivity (IHF standard) | 100 μ V/m (1000 kHz, bar antenna) 15 μ V (1000 kHz) |
| Image ratio | 90 dB or More (1000 kHz) |
| IF interference ratio | 70 dB or More (1000 kHz) |
| Signal-to-noise ratio | 45 dB or More (30% Modulation, 1 mV Input) |
| Amplifier Unit | |
| Music Power (Distortion 0.5%) | 200W (4 Ω) 170W (8 Ω) |
| Effective output (distortion 0.5%) | Single-Channel Operation : 80W/80W (4 Ω) 60W/60W (8 Ω) Double-channel operation : 53W + 53W (8 Ω) |
| Frequency characteristic | Main input : 8 Hz ~ 120 kHz ± 1.5 dB Aux input : 20 Hz ~ 30 kHz ± 1.5 dB |
| Output band characteristic | 15 hz to 30 khz -3dB (0.5% distortion, IHF) |
| Distortion Factor (1 kHz) | 0.15%(50W/50W) 0.08%(3W/3W) 0.1%(0.3W/0.3W) |
| Input Sensitivity / Impedance | Mag : 2.0mV/50k Ω Tape HD : 2.2mv/100k Ω Aux, Tape play : 160mV/100k Ω Main : 100mV/100k Ω |
| Tone control | Bass : ± 11 dB (100 Hz) Treble : ± 11 dB (10 kHz) |
| Loudness control | +10dB(100Hz) +5dB(10kHz) |
| Equalizer | RIAA NAB |
| High filter | 3 kHz or Less, 6dB/oct-cut |
| Low filter | 200 Hz or less, 6dB/oct-cut |
| SN ratio (maximum volume, tone flat) | Mag:65dB Tape HD:63dB Aux, Tape play : 75 dB |
| Residual noise | 0.8 mv (8 Ω, Volume Min) |
| Damping factor | 28 (8 Ω) 56 (16 Ω) |
| <General> | |
| Accessory circuit | FM mono to stereo automatic switching device Stereo display lamp Muting switch SCA Filters |
| Semiconductor used | Transistor : 52 FET : 3 IC : 4 Diode : 35 pcs |
| Pwer | 100 VAC / 117 V, 50Hz/60Hz |
| Power consumption | 34W (no signal) 250W at maximum output |
| External dimensions | Width 420x Height 140x Depth 310 mm |
| Weight | 12.3kg |