Technics ST-8075 Vintage FM/AM Stereo Tuner Japan

This FM/AM tuner is designed to complement the 75A integrated DC amplifier.

The front-end section utilizes a two-stage amplification with two dual-gate junction FETs offering excellent high-frequency characteristics, and incorporates a frequency-linear FM 4-gang variable capacitor in the RF stage to reduce interference.

The IF stage employs three ceramic filters with superior group delay characteristics as its selection element.

The MPX section employs an MPX demodulation circuit using a PLL-IC, cutting the 19kHz pilot signal and 38kHz subcarrier to -60dB, resulting in a wideband, low-swell characteristic.

Furthermore, a low-pass filter with a basic Chebytschev-type design is used in the subsequent stage of the MPX circuit to achieve a flat frequency response.