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. Sony built it for stability, durability and high-fidelity recording. It was marketed as a field recorder and runs on AC, dry batteries, car power or a rechargeable pack. Known informally as "Densuke 3000," it has a built-in monitor speaker, a shoulder strap, a large VU meter and an LED peak indicator. Sony brochures listed it alongside the TC-2500, which suggests the two shared a 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 speed control, which minimizes drift during recording. It has an F&F (Ferrite & Ferrite) head and a direct coupling method in the playback amplifier circuit for improved signal fidelity. A 3-position tape selector handles bias and equalizer adjustment. There is also Dolby B noise reduction and a Sony Limiter switch. A DC-DC converter and stabilized power supply keep performance consistent across all four power sources. It also has a microphone attenuator, auto shut-off, a memory indicator light (on for ~10 seconds) and the built-in monitor speaker.

Market

A carrying case, the LC-3000, was sold separately for ¥5,000. The unit itself comes with a shoulder strap. Servicing typically means 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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