Maintained! Sony's highest-grade 5-channel vari-controlled FM stereo tuner at the time. Equipped with a FET, the treble extension is excellent, and it also has the thickness unique to varicones. The retro and simple panel design is also attractive. The exterior has a feeling of use such as dullness and abrasions. Serial 20378 (Takahashi Nobuyuki)
Maintenance information: 2025.5.15 maintained (disassemble and inspect the front-end part, rewind the FM ratio detection transformer coil, replace the detection diode, adjust the S-shape detection characteristics, power supply circuit inspection, and stereo display lamp circuit, replace the 390Ω power cord, replace the tracking adjustment so that reception can be performed along the reception frequency scale plate)
2024.9.15 Maintained (detection circuit 10.7 MHzIFT resonance capacitor replacement after IFT adjustment, center meter operation and stereo reception normalization, LED lighting for meter lamp and scale plate lamp, MPX circuit part, 4 electrolytic capacitors replaced, MOD switch and HIBLEND switch contact cleaning treatment output terminal+side terminal holding power correction treatment procedure simple cleaning of OUTPUT volume and output level Set to 150 mV (when modulated at 100%), fixed output is set to 600 m V (when modulated at 100%)
2020.11.20 Maintained (meter lamp, dial scale lamp x 4, each semi-fixed VR replacement x 2, MPX circuit TR replacement x 11, power supply block capacitor x 2 replacement, SW, VR disassembly, cleaning, adjustment aging test, MUTING volume replacement, MUTING relay replacement)
Accessories: none
Main specifications: FM stereo tuner, reception frequency 76 MHz to 90 MHz, frequency characteristics, 20 Hz to 15 kHz, antenna terminal, 300 ohm balance, 75 ohm unbalance, W400 x H145 x D310 mm, 9.2 kg