The Sony TC-150B cassette recorder is a high-quality portable recorder from the late 1978s. This model is among the most robust and reliable Sony devices of its time and was frequently used for interviews, field recordings, and technical documentation. The device is Made in Japan and that is known for its solid mechanics, the analog REC/BATT VU meter, and the characteristic Sony design of that era. It features a high-quality metal housing with a solid and durable build Reverb, which distinguishes it from later plastic recorders of the era. Technical Specifications Model: Sony TC-150B Format: Compact cassette (mono) Inputs: Built-in microphone + external microphone input Built-in loudspeaker Display: Analog REC/BATT meter Power supply: 4× AA batteries (1.5V) or external AC/DC power supply Part Number: 3-545-716-01 Condition In good working condition >> RETURNS ACCEPTED Playback/rewind/record functions work No corrosion in the battery compartment Clean cosmetic condition with typical signs of use Included in delivery • Sony TC-150B Recorder • Carrying case • AC/DC power supply • Original Instruction manual • 2 audio cables >> Serial number 32565 Based on the SN the recorder was produced around late 1978 to mid 1979 This places it in the second production wave, after Sony refined the mechanics from the earlier TC 150/150A. Serials in the 30k range typically include: • The revised motor control board (more stable speed) • The improved pinch roller compound • The later type belt path, easier to service • Slightly quieter capstan motor compared to early runs Mid-run units are preferable because: • Early units (below ~15000) often have brittle plastics • Late units (above ~50000) sometimes used cost reduced components • Mid run units (25k–45k) are considered the “sweet spot” for reliability