Yamaha T-6a
Little is documented about the Yamaha T-6a beyond its technical specifications. It was a quartz-lock PLL stereo FM tuner, built at a time when the company was making its name with precise, natural-sounding separates. Audio (October 1979, p.70) ran a brief item touching on the model, but the surviving record from that review is fragmentary.
The front end used a dual-gate MOS FET, and the FM IF stage used a linear phase ceramic filter. The circuit count is 6 ICs, 5 FETs, 20 transistors, 21 diodes and 2 varactors, which points to a solidly built, mid-range design rather than a budget one. Outputs were both fixed and variable, each rated at 0-1.0V.
No production years, original price or market positioning have survived in the available sources. The T-6a also shows up in no clear product-family context. Nothing in the record mentions a T-6 sibling or ties it to other Yamaha tuners of the period.
- Type: Stereo FM tuner, quartz lock PLL
- Tuning range: 87.5–108 MHz
- Sensitivity: 2.5µV (FM) or 1.8µV (14.8dBf) IHF, depending on source
- Signal-to-noise ratio: 75dB (stereo IHF); 90dB at 65dBf
- Distortion: 0.15% (stereo, 1kHz)
- Frequency response: 30Hz–15kHz (+0.5, −1.5dB)
- Stereo separation: 45dB at 1kHz
- Outputs: Fixed 0–1.0V; Variable 0–1.0V (2.2k ohms)
- Dimensions: 435 × 113 × 264 mm
- Weight: approximately 4.3–4.5 kg (sources differ)
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