Audio Database

Image of TX-90
Commentary

AM/FM stereo tuner announced as a high-end model of the UA series.

FET is used for the FM front-end, and it is composed of two high frequency amplification stages.
For IF amplification, four ICs and a crystal filter with sharp characteristics are used to improve the selectivity and limiter effect in this amplification stage.

It is equipped with a variable muting circuit that can be set to the muting level suitable for strong electric field region and weak electric field region respectively, and it is compatible with the strength of the input.

Both AM and FM are equipped with independent output level control, and the level difference can be adjusted.

It is equipped with a noise filter effective for FM stereo.

The center indication type tuning meter and the signal strength meter work simultaneously at the time of FM.
In addition, the dial indicator is of the light quantity increasing type.

Model Rating
Type AM/FM stereo tuner
FM tuner circuit system High-frequency amplification using FET 2-stage front end
IF section using IC and crystal filter
FM antenna input 300 Ω balanced type
Receiving band FM : 76 MHz to 90 MHz
AM : 535 kHz to 1,605 kHz
Sensitivity (IHF) FM : 1.7 μ V
AM : 10 μ V
Capture ratio 1.5 dB (82 MHz, IHF)
Image ratio FM : 95 dB (82 MHz, IHF)
Effective selectivity 65dB
Signal-to-noise ratio 70dB(IHF)
60 dB (30% modulation)
Distortion factor 0.3% (400 Hz, 100% modulation)
Output voltage 1 V each (400 Hz, 300% modulation, controllable)
Accessory circuit FM muting circuit
MPX Noise Filter
Automatic switching between FM mono and stereo
AM ferrite bar antenna
Signal strength meter (FM)
Center Indicating Type Tuning Meter (AM/FM)
FM stereo indicator lamp
Dial pointer (light volume increasing dial indicator)
FM-AFC
Tape Rec connector
AC Outlet (1 Linked)
Power supply voltage 100 VAC, 50Hz/60Hz
Power consumption 12W, 14 va
External dimensions Width 405x Height 140x Depth 356 mm
Weight 7.8kg