FM Stereo Tuner (1977-81)
Staggering as the ST-9030 technical specifications may seem, the real test of true high quality performance lies in waveform fidelity.
Although the waveforms of all signals in music programs are usually extremely complex, there are two relatively simple forms - the square wave, and the tone burst signals that will clearly show how well the tuner performs.
The comparison here between Technics ST-9030 (where design considerations were all aimed at waveform fidelity) and a conventional tuner (where waveform fidelity has not been of prime importance) clearly illustrates the logical conclusion resulting from a critical difference in approach to this means of testing quality and performance.
The very steep sag in the square wave output signal in the conventional tuner indicates poor amplification phase characteristics in the low frequency region (thus introducing distortion), while the suppressed sections at the start of the 1kHz sine wave signals signify a contracted dynamic range in the low frequency region.
The ST-9030 shows clear superiority over the conventional tuner. Although the time lag is not so critical if it is consistent, the unstable response patterns, the shortened leading edge amplitudes and the ringing during the off times will introduce audible distortion.
Type: Mono/Stereo Tuner
Tuning Bands: FM
Tuning Scale: Analogue
FM Tuning Range: 88 to 108 MHz
Sensitivity: 1.2uV (FM)
Signal to Noise Ratio: 75dB (FM)
Distortion: 0.3% (FM)
Selectivity: 90dB (FM)
Frequency response: 20Hz to 18kHz (FM)
Dimensions: 450 x 92 x 370mm
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Reviewed Jan 05th, 2016 by titounat
Very nice tuner, very sensitive and very quite !
it has a 8 gangs variable capacitor.
But for best sounding, you have to replace the very poor original op-amp with a Burr Brown or with the very nice Sparkos SS3602 !
Reviewed Oct 29th, 2014 by tannoyman
very well engineered tuner with great sound quality. Also very sensitive!!!!
Reviewed May 21st, 2014 by rjm003
Great-looking and great-sounding tuner.