Detailed maintenance has been completed, such as replacing the output tube and refining the SW/VOL disassembly contacts. Capacitors were replaced in 2017. A kit model of a power amplifier using a 50CA10 3-pole output tube and an OY15 type output transformer, composed of circuits and parts conforming to the MQ60 type, which has been evaluated by LUXMAN. The sound of a vacuum tube has a sense of volume that seems to meet expectations, and it gently envelops you. The sound, which doesn't require scale, is particularly unique, and the slight thickness that spreads from below the mid-range makes you feel comfortable. There are dullness and small scratches appropriate to the model year (Oikawa Tetsuji)
Maintenance information: 2024.12.10 Maintained (output tube replaced. SW/VOL disassembly contacts are re-polished, and grease is applied to prevent oxidation and sulfidation. Load test (1 kHz sine wave, at 8 ohm load: 26 W+26 W actual measurement), sound output test)
2017.2.15 Maintained (SW/VR disassembly and cleaning, tubular electrolytic capacitors, oil capacitors, semi-fixed resistors, vacuum tubes, rectifier diodes, RCA terminals, SP terminal replacement, input/output waveform confirmation, circuit readjustment, load test, sound output test)
Accessories: copy of the manual
Main specifications: 30W+30W 50CA10 push pull W410 x H160 x D205 mm 13.8 kg