Audio Database

ST-260
Commentary

The front-end uses FET and 3-row varicon to obtain high sensitivity of 1.9 μ V.

The best tuning point can be easily selected by adopting the 2-meter method of signal and tuning.

The dial knob has a large knob and flywheel for improved operability.

Group delay characteristics have been improved by adopting a highly integrated IC in the IF stage.
In addition, PLL-IC is adopted in the MPX section, which is resistant to aging and realizes stable operation.

Muting is applied at the position of FM AUTO to eliminate inter-station noise.

Model Rating
Type FM/AM Tuner
Circuit system FM3 series varicon, super heterodyne system
MPX circuit of PLLIC specification
Specification semiconductor 1 FETx, 2 ICx, 8 Trx8, 8 Diox8, 1 LEDx
FM Tuner Section
Receiving frequency 76 MHz to 90 MHz
Practical sensitivity 1.9 μ V, 10.8 dBf (new IHF display)
Harmonic distortion factor Stereo : 0.4%
Mono : 0.2%
Signal-to-noise ratio (IHF) Stereo : 68 dB
Monaural : 73 dB
Frequency characteristic 20 Hz to 15000 Hz ± 1 dB
Effective selectivity 65dB
Image interference ratio 55dB
IF interference ratio 80dB
Capture ratio 1.0dB
Spurious interference ratio 80dB
AM suppression ratio 50dB
Stereo Resolution (IHF) 40dB(1kHz)
30 dB (50 to 10 kHz)
Rated output 500mV/5k Ω (400 Hz, 100% modulation)
Antenna terminal 300 Ω balanced, 75 Ω unbalanced
<AM Tuner Section>
Receiving frequency 525 kHz to 1605 kHz
Practical sensitivity (IHF) 300 μ V/m (bar antenna)
20 μ V (external antenna terminal)
Image interference ratio 40dB
IF interference ratio 40dB
Selectivity 25dB
Signal-to-noise ratio 45dB
Antenna With ferrite bar antenna and external antenna terminal
<General>
Pwer AC100V 50Hz/60Hz
Power consumption 6W
External dimensions Width 400x Height 146x Depth 305 mm
Weight 4.4kg
Remarks Dial Length 240 mm, with 2 Meters