TRIO KR-6340
¥ 135,000 (around 1973)
Commentary
The highest quality receiver realizes high power by BTL connection of 4 main amplifiers and 2 each for left and right.
All stages are directly connected to the main amplifier section, and three stages are directly connected to the equalizer amplifier using low-noise metal-can-shield transistors to reduce the aging of sound quality.
In addition, we have adopted a number of well-regulated power transformers, large heat sinks, and large-capacity capacitors.
It contains a CD-4 demodulator, an SQ decoder, an RM circuit and all 4 ch methods and can also be used as a 4 ch receiver by switching the switch on the back panel.
The MPX section of the tuner uses a double-switching and de-modulator. In addition, the latest circuit elements such as FET in the front end and 2-element ceramic filter in the IF stage are incorporated everywhere to improve reception characteristics.
In addition, a 200 mm long dial scale with a frequency linear varicon is adopted.
In addition, an FM / DET terminal is mounted for FM4ch broadcasting.
Model Rating
| Type | AM/FM stereo receiver | ||||
| FM Tuner Section | |||||
| Receiving frequency | 76 MHz to 90 MHz | ||||
| Antenna impedance | 300 Ω Balanced Type / 75 Ω Unbalanced Type | ||||
| Sensitivity | 2.0 μ V | ||||
| Chinese arrowhead's slope | 48 dB (5 μ V) 60 dB (10 μ V) 63 dB (50 μ V) |
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| Distortion Factor (400 Hz, 100% modulation) | Mono : 0.5% or less Stereo : 0.8% or less |
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| SN ratio (100% modulation, 100 μ V input) | 63 dB or more | ||||
| Capture ratio | 3.0dB(IHF) | ||||
| Selectivity | 50 dB or more (IHF) | ||||
| Image ratio | 60 dB or more | ||||
| IF interference ratio | 90 dB or more | ||||
| AM suppression ratio | 60 dB or more | ||||
| Harmonic spurious ratio | 90 dB or more | ||||
| Separation (1 kHz) | 40 dB or more | ||||
| Band Separation (50 Hz to 8 kHz) | 28 dB or more | ||||
| Subcarrier suppression ratio | 45 dB or more | ||||
| <AM Tuner Section> | |||||
| Receiving frequency | 520 kHz to 1,610 kHz | ||||
| Sensitivity | 25 μ V (IHF) | ||||
| Selectivity | 30 dB or more (IHF) | ||||
| Image ratio | 45dB | ||||
| IF interference ratio | 35 dB or more | ||||
| Amplifier Unit | |||||
| Music Power (IHF) | 2-channel operation : 170W (8 Ω) 4-channel operation : 120W (8 Ω) |
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| Effective power |
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| Total harmonic distortion factor (8 Ω at rated output) | Not more than 0.8% 0.3% or less (-3dB) |
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| Intermodulation distortion factor (60 Hz : 7 khz = 4 : 1, at rated output, 8 Ω) | Not more than 0.8% 0.3% or less (-3dB) |
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| Damping factor | 20 (4-channel operation, 1 kHz, 8 Ω) | ||||
| Residual noise (4-channel operation) | 1 mV or less | ||||
| Input Sensitivity / Impedance | Phono : 1.5mV/100k Ω AUX, Tape Play (PIN) : 150mV/50k Ω |
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| Recording Level / Impedance | Tape Rec (PIN) : 150mV/100 Ω Tape Rec(DIN):40mV |
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| Maximum Input Voltage | 100mV RMS 1kHz | ||||
| Signal-to-noise ratio | Phono:60dB AUX, Tape Play : 75 dB |
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| Frequency characteristics (AUX, Tape Play) | 20 Hz to 20 kHz ± 1 dB | ||||
| Equalizer (versus RIAA standard curve) | ± 1 dB | ||||
| Tone control | Bass : 100 Hz, ± 10 dB Treble : 10 kHz, ± 10 dB |
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| Loudness control (-30dB) | 100Hz:+10dB 10kHz:+5dB |
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| <General> | |||||
| Power supply voltage | 100 VAC / 117 V, 50Hz/60Hz | ||||
| Power consumption | 145W (Electrical Appliance and Material Control Law) | ||||
| External dimensions | Width 500x Height 153x Depth 360 mm | ||||
| Weight | 15kg | ||||