ขาย Tuner PIONEER TX-8100 รุ่นใหญ่หายาก สภาพสวย Made in JAPAN
ขาย Tuner PIONEER TX-8100 รุ่นใหญ่หายาก สภาพสวย Made in JAPAN
เสปคเครื่อง - รีวิวร์เครื่องจากต่างประเทศครับ ...
Pioneer TX-810 ¥53,000 (around 1973)
explanation
An FM/AM tuner that uses a highly integrated IC equivalent to 203 elements and a phase
linear ceramic filter.
In the front-end section, low-noise dual-gate MOSFETs are carefully selected and used in the
RF and mixer stages to improve practical sensitivity.
In addition, the tuning circuit using a four-channel varicon improves the interference
elimination capability.
A buffer circuit is provided in the local oscillator circuit, and even when a station with
a strong electric field strength is adjacent to each other, the function of the buffer circuit
prevents unstable phenomena such as pull-in phenomena.
The IF section uses a proprietary IC for IF that combines 203 elements into one using
Pioneer's technology.
In addition, the detection circuit uses quadrature detection, which has excellent linearity and
low distortion over a wide band.
In addition, emphasis is placed on phase characteristics within the passband, and a phase
linear ceramic filter is adopted.
The MPX circuit uses a highly integrated IC to deal with SCA beat interference and separation,
and the characteristics are improved by adopting a double-balanced differential
demodulation method.
It also uses a low-pass filter that cuts out harmful residual carriers at 19 kHz and 38 kHz,
which reduces carrier leakage.
A ceramic filter is used in the IF stage of the AM tuner section, which provides sharp slope
characteristics with a moderate bandwidth, and improves selectivity and sound quality.
In addition, the use of a highly integrated IC developed specifically for AM improves stability
during strong input.
In addition, the use of a balanced mixer ensures that there is no distortion in the local
oscillation waveform, and the spurious characteristics are also good.
The AM section also uses a tuned RF single-stage amplification using a triple varicon to
improve the image disturbance ratio and IF interference ratio.
It is equipped with a muting circuit, and the double-action effect of the combination of
semiconductor switching and reed relay suppresses transient pop noise during tuning
and suppresses unpleasant shock noise during synchronization.
A new type of signal meter is adopted.
The input signal is taken from each limiter stage, detected by a level detector, and a signal
with good linearity is added to the meter in a gentle curve through a DC amplifier, so that the
input signal from small input to large input is accurately tracked.
The headphone amplifier uses an OTL amplifier with a Darlington connection, and the
volume level can be controlled on the front panel.
It is equipped with a multipath terminal and is used to select the antenna direction with the
least mutual interference due to multiple reflections of sound waves.
By connecting a stereo display SD-100 or an oscilloscope, you can easily find the best
antenna direction.
It is equipped with an MPX noise filter that cuts out noise when receiving FM stereo
broadcasts.
It is equipped with two output terminals, fixed and variable, and the output level of the
variable output terminal can be adjusted independently by FM and AM.
Model Ratings
Model AM/FM Stereo Tuner
<FM tuner section>
Circuit method MOS FET RF 1 Stage, 4 Varicons 6 Stage Limiter
Quadrature Detection
Practical Sensitivity (IHF) 1.8μV
Capture Ratio (IHF) 1dB
Effective Selectivity (IHF) 80dB
SNR 70dB
Image Interference Ratio (82MHz) 90dB or more
IF Interference Ratio (82MHz) 100dB or more
Spurious Disturbance Ratio 100dB or more
AM Suppression Ratio 55dB
Harmonic distortion mono: 0.2% or
less stereo: 0.4% or less
Frequency response (stereo) 20Hz～15kHz +0.2 -2.0dB
50Hz～10kHz +0.2 -0.5dB
Stereo Separation 1kHz: 40dB or more
50Hz~10kHz: 30dB or more
Carrier Leak Suppression Ratio 65dB
antenna 300 Ω balanced
75 Ω unbalanced
Muting ON-OFF
MPX Noise Filter ON-OFF
<AM tuner section>
Circuit method Tuned RFsingle-stagetriple varicon
Practical sensitivity (IHF, bar antenna) 300μV/m
Practical Sensitivity (IHF) 15μV
Selectivity 40dB
SNR 50dB
Image Disturbance Ratio 65dB or more
IF Disturbance Ratio 85dB or more
antenna Ferrite bar antenna included
< Comprehensive >
Output Level/Impedance Fixed:650mV/4.7kΩ
Variable:70mV～2V/300Ω
Headphone:150mV(8Ω)
Semiconductors used Transistors: 19
FETs: 2
ICs: 4
Diodes: 9
Power supply voltage AC100V、50Hz/60Hz
Power outlet Power switch not interlocked: 1 system
Power Consumption 27W
External dimensions Width 430 x Height 138 x Depth 345 mm
weight 7.9kg
ได้รับการโหวต ความน่าเชื่อถือในการซื้อ-ขายสินค้า จากสมาชิกทั้งหมด 17 ท่าน
