Sony TC-2120 (c. 1969)
The first Sony cassette deck, released around 1969 with transistorized circuitry and automatic level control.
Overview
The Sony TC-2120 is recognized as the company's first cassette deck, marking Sony's entry into the cassette format. Introduced around 1969, it was a portable unit designed for both recording and playback using 4-track, 2-channel tape configuration. It features a microphone input, headphone jack, and built-in noise suppressor switch, aimed at improving recording clarity. The deck uses Sony-O-Matic recording, which automatically adjusts input levels during recording to prevent distortion.
Specifications
| Product type | Cassette deck |
| Track format | 4-track 2-channel |
| Tape speed | 4.8cm/s |
| Wow and flutter | Not more than 0.2% |
| Distortion factor | 2.5% (OVERALL) |
| Frequency characteristic | 50 Hz to 10 kHz |
| S/N | 45dB |
| Input terminal | Microphone : 600 Ω, minimum input level -72dBs (0.2 V); Auxiliary Input : 100k Ω, Minimum Input Level -22dBs (0.06 V) |
| Output terminal | Line : 100k Ω, Reference output 0 dBs (0.775 V); For Headphones : 8 Ω |
| Recording and reconnector | DIN Standard |
| Semiconductor used | Transistor : 18; Diode : 6 pcs |
| Power | 100 VAC 50Hz/60Hz |
| Power consumption | 17W |
| External dimensions | Width 329 x Height 86 x Depth 187 mm |
| Weight | 3.4kg |
| Original price | ¥25,800 (around 1969) |
| Attachment | Recording and Recoding (RC-2); Demo Tape (C-30) |
Design
The TC-2120 uses an all-silicon transistor design with 18 transistors and 6 diodes. It features frequency generator/frequency discriminator servo control for speed regulation. The unit includes a noise suppressor switch, a sentinel lamp that blinks during tape operation, and a 3-digit tape counter. Sony-O-Matic recording automatically adjusts recording volume, and the deck is equipped with both microphone input and headphone jack.
Context
The Sony TC-2120 holds historical significance as the first cassette deck produced by Sony, representing the company’s early commitment to the compact cassette format shortly after its introduction by Philips.
Market
Replacement belts and rollers are commonly available, indicating these are typical wear items. A service manual covering the TC-2120 (shared with the TC-125) exists, aiding restoration. Listings show varied pricing, including a unit offered at $69 and another at $9.17, reflecting condition and regional differences.
eBay Listings
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