Accuphase T-101
¥ 110,000 (released in May 1974)
Commentary
An FM stereo tuner was developed with the aim of driving Radio noises, noise, distortion, etc. mixed during transmission below the limit level that cannot be detected by the ears.
The front-end section combines a high-frequency amplification stage and mixing circuit using a 4-channel frequency number line FM-dedicated precision varicon, a dual-gate MOS FET, and a high-stability local oscillation circuit with a buffer to obtain excellent characteristics with a wide dynamic range.
The IF circuit employs a variable selectivity type to resolve adjacent interference, and is a combination of a newly developed 10-stage LC concentrated phase linear bandpass filter and a high-selectivity piezoelectric transducer filter to reduce distortion.
Normally, only the linear-phase filter works, and when there is adjacent interference, a Viezo oscillator filter is added by switching the Selectivity switch to Narrow to add a high-selectivity characteristic and clear reception can be obtained by removing Radio noises.
The detector circuit uses a 1200 kHz wide-band discriminator with a bandwidth three times that of the ordinary one.
The stereo demodulation section employs a phase-locked loop demodulation circuit that automatically synchronizes the phase of the pilot signal sent from the broadcasting station with the phase of the subcarrier oscillator without using any coils or capacitors.
In addition to the signal strength meter and center tuning meter, an independent multi-path meter is mounted.
This meter makes it easy to find out the best direction of the antenna.
It is equipped with a muting switch, a stereo noise filter, and a switch that receives only FM stereo broadcast transmission.
A detection output circuit is also installed in preparation for 4-channel broadcasting.
There was a walnut cabinet sold separately.
Model Rating
Type | FM stereo tuner | ||||||||||||
MonAural Characteristics | |||||||||||||
Practical sensitivity | 11 dBf (new IHF) 2.0 μ V (IHF) |
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50dBS/N | 18 dBf (new IHF) 4.5 μ V (IHF) |
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Standing-wave ratio | 1.5 | ||||||||||||
S/N (65 dBf input) | 75dB | ||||||||||||
Harmonic distortion factor (65 dBf input Selectivity switch Normal) |
100Hz:0.1% 1kHz:0.1% 10kHz:0.2% |
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IM Distortion Factor (14 hz : 15 khz = 1 : 1) | 0.2% (65 dBf, 100% modulation) | ||||||||||||
Frequency characteristic | 20 Hz ~ 15000 Hz + 0 -1.0 dB | ||||||||||||
2-signal selectivity (45 dBf input) |
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Capture ratio | 2.0dB | ||||||||||||
RF intermodulation | 70dB | ||||||||||||
Spurious interference ratio | 100dB | ||||||||||||
Image ratio (76 mhz to 90 mhz) | 90dB | ||||||||||||
IF interference ratio | 100dB | ||||||||||||
AM suppression ratio (65 dBf input) | 55dB | ||||||||||||
Frequency stability | ± 30 kHz | ||||||||||||
Frequency accuracy | + / - 0.2% | ||||||||||||
Output voltage (100% modulation) | 2.0V | ||||||||||||
Stereo Characteristics | |||||||||||||
Practical sensitivity | 31 dBf (new IHF) 20 μ V (IHF) |
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50dBS/N | 38 dBf (New IHF) 45 μ V (IHF) |
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S/N (65 dBf input) | 70dB | ||||||||||||
Harmonic distortion factor (65 dBf input, Selectivity Normal) |
100Hz:0.2% 1kHz:0.2% 10kHz:0.5% |
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Frequency characteristic | 20 Hz ~ 15 kHz + 0 -1.0 dB | ||||||||||||
Stereo separation factor | 100Hz:35dB 1kHz:45dB 10kHz:30dB |
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Stereo switching input voltage | 19 dBf (new IHF) 5 μ V (IHF) |
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Muting level | 19 dBf (new IHF) 5 μ V (IHF) |
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<General> | |||||||||||||
SCA interference ratio | 60dB | ||||||||||||
Leakage at 19 khz and 38 khz | -70dB | ||||||||||||
Variable capacitor used | Frequency number line Type Precision 4 Train | ||||||||||||
Output impedance | Fixed output terminal : 200 Ω Variable Output Terminal : 2.5k Ω |
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Antenna input impedance | Balance : 300 Ω Unbalanced : 75 Ω |
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Meter | 3 pieces Signal strength meter, multi-pass, center tuning |
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Semiconductor used | Transistor : 25 FET : 2 IC : 7 Diode : 24 units |
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Power supply voltage | AC100V/117V/220V/240V, 50Hz/60Hz | ||||||||||||
Power consumption | 26W | ||||||||||||
External dimensions | Width 455x Height 152x Depth 355 mm | ||||||||||||
Weight | 11.1kg | ||||||||||||
Sold Separately | Wood Cabinet A-3 |