KENWOOD KT-V880
¥ 45,000 (around 1987)
Commentary
FM/AM/TV tuner adopting pentacle circuit.
It is theorized that the synthesizer tuner can obtain a constant frequency because it compares the phase of the local oscillation frequency and the reference symbol with crystal accuracy, but in reality, a slight error occurs. Even a tuner with a high signal-to-noise ratio at 90 MHz lowers to a low signal-to-noise ratio at a low frequency such as 76 MHz.
To eliminate this phenomenon and enjoy a high signal-to-noise ratio, it is equipped with a direct linear reception circuit.
We have adopted a new layout pentacle circuit that connects the power supply and each stage at the shortest distance.
This eliminates the interference between the various stages through the power supply and greatly improves the low-level playback capability.
It is equipped with a TV tuner that adopts a newly developed front end.
This TV tuner is also equipped with a pentacle circuit, and since the power source and each stage are directly connected at the shortest distance, interference between each stage via the power source is eliminated and low-level playback capability is improved.
In addition, the IF section and detection section are shared with FM for higher sound quality.
Equipped with an auto Chinese arrowhead control that improves the SN ratio by up to 20 db when receiving low-voltage stereo.
In addition, the SN ratio and separation can be controlled automatically according to the electric field strength.
Equipped with -6dB Rec calibration at 100% modulation.
It has a 20-station random memory function.
Equipped with FM / IF band 2-stage switching function.
Model Rating
| Type | FM/AM Tuner | ||||
| <FM tuner> | |||||
| Receiving frequency range | 76 MHz to 90 MHz | ||||
| Antenna impedance | 75 Ω unbalance | ||||
| Sensitivity (75 Ω) | Distance : 0.95 μ V/10.8 dBf Direct : 10 μ V/31.2 dBf |
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| SN ratio 50 dB sensitivity |
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| Harmonic distortion factor (1 kHz) |
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| SN ratio (100% modulation, 85 dBf input) | mono:88dB stereo:82dB |
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| Capture ratio | wide:1.0dB narrow:2.5dB |
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| Effective selectivity (IHF) | wide:48dB narrow:60dB |
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| Stereo separation | wide:60dB(1kHz) | ||||
| Frequency characteristic | 20 Hz to 15 kHz ± 0.5 dB | ||||
| Image interference ratio (84 MHz) | 90dB | ||||
| IF Interference Ratio (84 MHz) | 120dB | ||||
| Spurious interference ratio (84 MHz) | 110dB | ||||
| AM suppression ratio (65.2 dBf) | 72dB | ||||
| Subcarrier suppression ratio | 70dB | ||||
| Output Level / Impedance | 0.6V/3.3k Ω (1 kHz, 100% modulation) | ||||
| <AM Tuner> | |||||
| Receiving frequency range | 531 kHz to 1602 kHz | ||||
| Sensitivity | 10 μ V / 250 μ V/m | ||||
| Harmonic distortion factor (1000 kHz) | 0.3% | ||||
| Image interference ratio (1000 kHz) | 40dB | ||||
| IF Disturbance Ratio (1000 kHz) | 55dB | ||||
| Selectivity (IHF) | 25dB | ||||
| Output Level / Impedance | 0.18V/3.3k Ω | ||||
| Signal-to-noise ratio | 52 dB (30% modulation, 1 mV input) | ||||
| TV Tuner | |||||
| Receiving channel | VHF : 1-12ch UHF : 13 ch to 62 ch |
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| Antenna impedance | VHF : 75 Ω unbalanced UHF : 300 Ω balanced |
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| Sensitivity | VHF : 3.0 μ V UHF : 20 μ V |
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| Signal-to-noise ratio | VHF:60dB | ||||
| Harmonic distortion factor | 0.2% | ||||
| Channel separation | 40dB | ||||
| Output Level / Impedance | 0.45V/3.3k Ω (FM, 1 kHz, 100% modulation) | ||||
| <General> | |||||
| Pwer | 100 VAC, 50Hz/60Hz | ||||
| Rated power consumption (Electrical Appliance and Material Control Law) | 13W | ||||
| Maximum external dimensions | Width 440x Height 78x Depth 317 mm | ||||
| Weight | 3.7kg | ||||