TRIO KT-3005
¥ 33,800 (released in 1973)
Commentary
An FM/AM tuner developed by inheriting the technology of high-end machines.
In the double switching de-modulator method, the outputs of the main switching circuit and the auxiliary switching circuit are symmetrical and opposite in phase, and the leakage signal is canceled by adding the outputs of both switching circuits. A phase correction circuit is mounted in front of the auxiliary switching circuit so that the phases of the main signal and the leakage signal match.
This prevents the deterioration of the separation caused by the phase difference between the main signal and the auxiliary signal at the IF stage.
A frequency linear type varicon with linearly variable capacity is adopted, and a scale that is easy to select channels is realized by adopting an equally spaced scale.
Equipped with MPX filter, FM Stereo display lamp and coaxial cable adapter.
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Model Rating
| Type | FM/AM Tuner |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Antenna impedance | 300 Ω equilibrium 75 Ω unbalance |
| Sensitivity | 2.0 μ V/84MHz |
| Chinese arrowhead's slope | 48 dB (3 μ V) 60 dB (10 μ V) 63 dB (50 μ V) |
| Distortion factor | 0.5% |
| SN ratio (100% modulation, 100 μ V input) | 65dB |
| Capture ratio | 2.5dB |
| Selectivity (IHF) | 50dB |
| Image ratio | 55dB(84MHz) |
| IF interference ratio | 90dB(84MHz) |
| AM suppression ratio | 60dB |
| Harmonic spurious response | 90dB |
| <FM MPX Part> | |
| Separation | 40dB(400Hz) 35 dB (100 Hz to 8 kHz) |
| Carrier leakage | -45dB |
| Distortion factor | 0.8% |
| Signal-to-noise ratio | 60dB |
| Frequency characteristic | 30 Hz to 15 kHz + 0.2 -2dB 100 Hz ~ 10 kHz + 0.2 -0.3 dB |
| SCA interference ratio | 45dB |
| <AM Tuner Section> | |
| Receiving frequency | 520 kHz to 1610 kHz |
| Sensitivity | 25 μ V (IHF) 300 μ V/m (bar antenna) |
| Image ratio | 45dB |
| IF interference ratio | 35dB |
| Signal-to-noise ratio | 45dB |
| Selectivity | 30dB |
| Distortion factor | 1% |
| <General> | |
| Rated Output (400 Hz) | FM (100% modulation) : 1.0 V AM (30% modulation) : 0.15 V |
| Output impedance | 120 Ω |
| Power supply voltage | 100 VAC / 117 V, 50Hz/60Hz |
| Rated power consumption (Electrical Appliance and Material Control Law) | 18W |
| External dimensions | Width 435x Height 153x Depth 300 mm |
| Weight | 7.7kg |