ONKYO Integra T-417

Commentary

FM stereo tuner with automatic IF bandwidth switching

Front end of input double tune configuration and frequency linear type high precision 7 series varicon is adopted.
In addition, an ultra-low distortion factor dual-gate MOS FET (x3) with a wide dynamic range and low generation of high-order harmonic distortion such as third order distortion is adopted for the elements of the 2-stage RF and mixer stage.

It is equipped with automatic 2-stage switching of IF bandwidth that automatically realizes the best sound quality according to the radio wave condition of the receiving area.
For high-S/N stations, the WIDE position is selected, and a phase equalization filter operates in addition to a wide-band 4-element linear phase filter with a county delay time within ± 0.2 μ s, to obtain low-distortion sound quality.
In low S/N reception areas, the NARROW position operates, and adjacent station interference is sharply cut with a selectivity of 85 dB.
In addition, a D-MOS FET is used for the IF input stage, and four high-slew rate double-base differential ICs are used for the filter coupling element, resulting in improved quality.

The detector employs a wide-band balanced ratio detector that strictly selects the quality through blocking. In addition, the MPX section of the PLL / IC incorporates an auto-canceler that cancels the pilot signal at the same amplitude and opposite phase. In addition, sufficient NFB is applied inside the IC to reduce distortion.
It is also equipped with a beat canceler that can extract pure 38 kHz switching signals (for LR separation). It has achieved significant results in reducing mid-range distortion and high-range beat, and realizes low distortion and high separation over a wide range.

The audio section uses a Super Servo DC amplifier.

The power supply uses a ± 15 v constant voltage power supply and a powerful power supply equipped with a high-capacity Chemi-Con. Three bus lines supply power to the MPX and audio.
The low-impedance power supply and distribution line and power supply section further improve the musical performance.

Equipped with automatic noise reduction function of input level detection type.

Equipped with 2-stage switching FM muting.

Equipped with F-type connector antenna terminal for switching between A and B2 systems.

Equipped with a linear type signal meter up to 80 dBf and a deviation meter with multi-path meter switching.

440 Hz, 50% modulation air check calibrator

With level variable output terminal and fixed output terminal for recording.

Model Rating

Type	Super Servo / Quartz Lock FM Stereo Tuner
FM Tuner Section
Receiving frequency	76 MHz to 90 MHz
Practical sensitivity	0.9 μ V/10.3 dBf (75 Ω / IHF)
S/N50dB sensitivity	1.7 μ V/15.8 dBf (75 Ω / IHF)
Intermodulation interference ratio	96 dB (± 1 MHz), 108 dB (± 2.5 MHz)
Image interference ratio	120dB(83MHz)
IF interference ratio	120dB(83MHz)
Signal-to-noise ratio	mono:90dB stereo:86dB
Spurious interference ratio	120dB
Two signal selectivity (± 400 kHz detuning)	IF Wide:50dB IF Narrow:85dB
AM suppression ratio	IF Wide:65dB IF Narrow:55dB
Capture ratio	IF Wide:1.0dB IF Narrow:2.0dB
Distortion factor	Mono, 400 Hz : 0.025%(IF Wide) 0.1%(IF Narrow) Mono, 50 Hz to 10 kHz : 0.07%(IF Wide) 0.25%(IF Narrow) Stereo, 400 Hz : 0.05%(IF Wide) 0.3%(IF Narrow) Stereo, 50 Hz to 10 kHz : 0.13%(IF Wide) 0.4%(IF Narrow)
Frequency characteristic	20 Hz ~ 15000 Hz + 0.2 -0.8 dB
Antenna impedance	75 Ω
Stereo separation	1kHz: 55dB(IF Wide) 45dB(IF Narrow) 100 Hz to 10 kHz : 45dB(IF Wide) 40dB(IF Narrow)
Carrier leak	-65dB
Output Voltage / Impedance	Variable Output : 0 ~ 1200 mV / Maximum 47 Ω 450mV/3k Ω
<General>
Semiconductor used	12 ic, 56 tr (8 fet), 43 di
Pwer	100 VAC, 50/60Hz
Power consumption	14W (Electrical Appliance and Material Control Law Standard)
External dimensions	Width 435x Height 108x Depth 384 mm
Weight	7kg