Audio Database

TU - α 507i
Commentary

FM/AM tuner equipped with SLRC (Super Liner Receiving Circuit).

A newly developed super linear receiving circuit : SLRC is mounted on the front end part.
As a result, both high sensitivity reception capability at weak input and interference rejection capability at strong input are simultaneously obtained, and reception performance for receiving FM stations in excellent condition is realized.
The antenna input section uses an AGC circuit with a PIN diode and a dual gate MOS FET to minimize distortion in high-field regions.
In addition, a 75 Ω dedicated antenna input is mounted to eliminate matching loss and enable reception with high sensitivity and low distortion rate.

The IF section has a WIDE/NARROW band switching function.
In WIDE mode, a low-distortion wide-band ceramic filter with excellent phase characteristics is used, and in NARROW mode, an additional narrow-band high-performance filter is added to enhance adjacent interference rejection.
As a result, high-quality reception is possible in WIDE mode, and clear reception is possible in NARROW mode by cutting out adjacent station interference in strong electric field region.

FM/AM can be memorized for 10 stations each by 10 keys.

If you connect a timer, you can program 2 broadcasting stations with different time zone and record absence.

A newly developed board with excellent vibration damping and insulation characteristics is used.

Uses an FM antenna terminal dedicated to 75 Ω to eliminate matching loss.

TV Bus Mute, Noise Canceler, Preset Scan, Preset Memory, etc.

Model Rating
Type FM/AM Tuner
<FM Part>
Practical sensitivity 10.8dBf
SN50dB Sensitivity mono:16dBf
stereo:36.0dBf
Effective selectivity Wide:55dB
Narrow:75dB
Signal-to-noise ratio mono:86dB
stereo:80dB
Distortion factor mono:0.05%
stereo:0.06%
Separation 50dB
Image interference ratio 80dB
Spurious interference ratio 100dB
IF interference ratio 100dB
Antenna impedance 75 Ω
Preset memory 10 stations
<AM Department>
Practical sensitivity 48dB/m
Effective selectivity 35dB
Signal-to-noise ratio 50dB
Distortion factor 0.5%
Preset memory 10 stations
<General>
Rated power consumption 9W
External dimensions Width 448x Height 80x Depth 292 mm
Weight 3.5kg