Sony TC-3000SD (1976)
A portable stereo cassette recorder built for field use with professional-grade specs and multiple power options.
Overview
The Sony TC-3000SD is a portable stereo cassette recorder introduced in 1976 with a focus on stability, durability, and high-fidelity recording. It was marketed as a field recorder, capable of running on AC, dry batteries, car power, or a rechargeable pack—making it versatile for mobile use. Known informally as "Densuke 3000," it features a built-in monitor speaker, shoulder strap, and robust signal monitoring with a large VU meter and LED peak indicator. It was listed alongside the TC-2500 in Sony brochures, suggesting a shared product tier.
Specifications
| Heads | Erase: 1, Recording/Playback: 1 (F&F type) |
| Motor | Frequency servo motor with FG (Frequency Generator) |
| Signal-to-noise ratio | 59 dB (Dolby off, Peak Level, using Duadcassette) |
| Frequency response | 20 Hz ~ 16 kHz (using Duadcassette) |
| Wow and flutter | 0.08% WRMS |
| Total harmonic distortion | 1.3% (using Duadcassette) |
| Monitor speaker output | 700mW (EIAJ) |
| Power sources | AC 100V; Dry battery 6V (D cell x4); Car Battery (optional DCC-130 adapter); Rechargeable Battery (separately sold BP-8H) |
| Battery life | Approximately 10 hours (using Eveready Alkali AM-1); Approximately 4 hours 30 minutes (using Sony Super SUM-1S) |
| Power consumption | 10W (AC operation) |
| Dimensions (W x H x D) | 350 x 100 x 240 mm |
| Weight | 4.6 kg (including dry batteries) |
Design
The TC-3000SD uses a frequency servo motor with a directly coupled frequency generator for precise speed control, minimizing drift during recording. It features an F&F (Ferrite & Ferrite) head and a direct coupling method in the playback amplifier circuit for improved signal fidelity. The unit includes a 3-position tape selector for bias and equalizer adjustment, Dolby B noise reduction, and a Sony Limiter switch. A DC-DC converter and stabilized power supply ensure consistent performance across all four power sources. Additional features include a microphone attenuator, auto shut-off, a memory indicator light (on for ~10 seconds), and a built-in monitor speaker.
Market
A carrying case, the LC-3000, was sold separately for ¥5,000. The unit includes a shoulder strap for portability. Servicing typically involves belt replacement, switch cleaning, and lubrication. One listing notes a broken cassette door as a common physical issue, and general maintenance is noted as frequent with older cassette mechanisms.
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