Audio Database

SAX-250
Commentary

FM/AM receiver targeted for personal use.

The front end of the FM tuner section is equipped with an FET and a 3-row varicon.
In addition, a 5-stage IF amplifier achieves low distortion rate and high sensitivity.

The power amplifier section uses a quasi complimentary service circuit using silicon transistors.

It is equipped with FM stereo indicator, MPX noise canceler, automatic FM stereo switching function, tape monitor and loudness control.

Model Rating
Type FM/AM Receiver
<Audio section>
Music Power (IHF) 36W (4 Ω)
32W (8 Ω)
Effective power 16W/16W (4 Ω)
14W/14W (8 Ω)
Total harmonic distortion factor Not more than 1%
Intermodulation distortion factor (60 hz : 7 khz = 4 : 1) Not more than 1.5%
Power Band With (IHF) 30 Hz ~ 25 kHz (Distortion Factor 1%)
Frequency characteristic 25 Hz to 30 kHz ± 2 dB (normal output, aux, over all)
Channel separation Phono : 40 dB or more (1 kHz)
Aux : 45 dB or more (1 kHz)
Damping factor 20 or More (8 Ω)
Load impedance 4 Ω ~ 16 Ω
Hum and noise (IHF) Phono : 65 dB or more (closed circuit)
Input Sensitivity / Impedance
(at 1 kHz for the rated output voltage)
Phono : 3.0 mV ± 3dB/50k Ω
Aux : 180 mv ± 3dB/100k Ω
Tape mon (pin) : 180 mv ± 3dB/100k Ω
Recorded output (for rated input) Tape Rec (pin) : 180 mv ± 3 db
Tape Recorder (din) : 30 mv ± 3 db
Tone control Bass : ± 10 dB (50 Hz)
Treble : ± 10 dB (10 kHz)
Loudness (Volume-30dB) 50Hz:+11dB
10kHz:+3dB
FM Tuner Section
Receiving frequency 76 MHz to 90 MHz
Sensitivity 2.5 μ V (S/N20dB, MOD30%)
Practical sensitivity (IHF) 3 μ V
Total harmonic distortion factor Not more than 1%
1.5% or less (at MPX)
Signal-to-noise ratio 50 dB or more
Selectivity 35dB
Capture Ratio (IHF) 3dB
Image ratio 45dB
Separation 30 dB (input 60 dB, 1 kHz)
Unwanted radiation 34 dB or less
Antenna input impedance 300 Ω equilibrium
75 Ω unbalance
<AM Tuner Section>
Receiving frequency 535 kHz to 1,605 kHz
Practical sensitivity (IHF) 51dB/m (ferrite bar antenna)
Selectivity 20dB(1,000kHz)
Image ratio 35dB
IF Rejection 45 dB or More (1,000 kHz)
<Others>
Semiconductor used Transistor : 26
Diode : 18 pcs
Pwer 100 VAC, 50Hz/60Hz
Power consumption 15 VA (No Signal)
100 VA (Maximum Output)
External dimensions Width 402x Height 116x Depth 282 mm
Weight 9.5kg