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Pioneer TX-8900

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Technic details

Specifications

Type:
AM/FM stereo tuner
[FM tuner part]
Circuit system:
Two steps of MOS FET RF, a 5-unit variable condenser, an eight-step limiter
A super-wide band wave detector, PLL MPX
Practical speed:
Mono - 2.5µV (S/N 50dB) / 1.5µV (IHF)
Stereo - 35µV (S / N 50dB)
S / N ratio:
Mono - 80dB
Stereo - 75dB

[Total Harmonic Distortion]
Mono:
0.15% (100Hz)
0.15% (1kHz)
0.15% (10kHz)
Stereo:
0.2% (100Hz)
0.2% (1kHz)
0.5% (10kHz)
Capture ratio:
1dB
Effective selectivity:
85dB (400kHz)
55dB (300kHz)
Separation:
40dB or more (1kHz)
35dB or more (50Hz to 10kHz)
Frequency characteristic:
50Hz to 10kHz, +0.2 -0.5dB
20Hz to 15kHz, +0.2 -1.5dB
Image stonewalling ratio:
110dB or more
IF stonewalling ratio:
110dB or more
Spurious stonewalling ratio:
110dB or more
AM suppression ratio:
55dB
Muting operation level:
5µV / 22µV
Antenna:
300Ω (Balance type)
75Ω (Unbalance type)
[AM tuner part]
Practical speed:
300µV / m (Bar antenna)
15µV (IHF)
Selectivity:
40dB
S/N ratio:
50dB
Image stonewalling ratio:
65dB or more
[Synthesis]
An Output voltage/impedance:
Fixed - 650mV / 5kΩ
Variable - 70mV-2V / 3.5kΩ
4ch MPX - 400mV / 2.5kΩ
The semiconductor used:
Transistors x 34, FET's x 3, IC's x 11, Diodes, others x 23
AC outlet:
Power-switch un-interlocking - 1 line

Power supply voltage:
AC 100V, 50 / 60Hz
Power consumption:
18W (Rate)
Dimensions (W x H x D):
420 x 150 x 365mm
Weight:
9.1kg
Year:
Around 1975

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