Nakamichi ST-70
Not much is documented about the Nakamichi ST-70. It was a tuner. It shows up in several sources with spec titles that point to FM/AM performance, but no production years, original price, or market context survived in the research notes.
The specs that are known describe a solid, conventional late-era analog tuner. The FM section covered 88-108 MHz with 1.8 µV (DIN) sensitivity. Mono distortion was rated at 0.1% and stereo at 0.15%. Signal-to-noise was 78 dB mono and 72 dB stereo (IFF). The AM band ran 530-1605 kHz. Output was 1 V fixed or 600 mV variable. Power consumption was 17 watts, and the chassis measured 458 × 92 × 350 mm at 6.0 kg.
No topology or component-level details have been found. Nothing is known about the RF front-end, the IF stage, the detector type, or whether it used quartz synthesis or manual tuning. The magazine record is just as empty, with no substantive review content in the period sources available. No owner commentary, no collectibility data, and no service notes are recorded.
If you own an ST-70, the archive would welcome hearing from you. The surviving record is thin enough that even basic details, like its place in Nakamichi's lineup, would help.
- FM: 88–108 MHz, 1.8 µV (DIN) sensitivity
- Distortion: 0.1% mono / 0.15% stereo
- S/N: 78 dB mono / 72 dB stereo (IFF)
- AM: 530–1605 kHz
- Output: 1 V fixed / 600 mV variable
- 17 W power consumption; 458 × 92 × 350 mm; 6.0 kg
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