Denon TU-7.5S (circa 1993)
The TU-7.5S was Denon's FM/AM tuner for the Point Component Series, sold around 1993 at ¥36,000. It's a compact unit, 250 mm wide and just 75 mm tall, built to sit next to the matching PMA-7.5S pre-main amplifier. The tuner supports AM stereo, which was still a live format in Japan at the time. It covers the Japanese FM band of 76.0 to 90.0 MHz.
Denon packed a fair amount of convenience into the small chassis. There's a random preset function for 30 FM/AM stations. The system remote that shipped with the PMA-7.5S can recall those presets and toggle power on the tuner. Two timer functions (Everyday and Sleep) work with a switched AC outlet, so the tuner can start alarm playback or record a broadcast while you're away. A low-impedance output circuit (500 Ω or less) keeps the signal clean into any amp.
Performance figures from the period are respectable. FM signal-to-noise is rated at 78 dB stereo and 82 dB mono. Harmonic distortion is 0.15% (stereo, 90% modulation) and 0.08% (mono, 100% modulation). Stereo separation is 45 dB at 1 kHz, and practical sensitivity is 1.0 μV/75 Ω (11.2 dBf). The AM section covers 522 to 1629 kHz with 18 μV sensitivity. Power consumption is 9 W, and the unit weighs 2.5 kg.
- FM: 76.0–90.0 MHz, 75 Ω F-type antenna terminal
- AM: 522–1629 kHz, AM stereo capable
- 30-station random preset (FM/AM combined)
- Everyday and Sleep timers with switched AC outlet
- Dimensions: 250 × 75 × 319 mm (W×H×D); 2.5 kg
Beyond the specs, the historical record is thin. No period reviews of the TU-7.5S have surfaced, and production years beyond the 1993 price context aren't documented. Used units appear mostly in Russia, where they're noted as 100-volt Japanese-market items, and on Japanese auction sites. They typically sell for modest sums, sometimes bundled with the matching PMA-7.5S amplifier.
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