Sony TC-K81
Dolby B NR Wired Remote Control Full Logic Metal Tape 3 Head

This Sony TC-K81 is a stereo cassette deck with Dolby B noise reduction, it was first sold by Sony in 1980 with a manufacturer suggested retail price of USD $500 and discontinued a year later.

The main features of the Sony TC-K81 are: 3 heads and off-tape monitoring, mechanical 3 digit tape counter and memory stop, manual tape type selection and capable of handling normal, chrome, ferro-chrome and metal tapes, belt driven dual-capstan transport.

Typical front loading cassette deck with the cassette compartiment located on the left side of the deck. Tape eject is operated mechanically and the cassette needs to be placed with the side to be played facing forward in the cassette well which is opened by a damped mechanism. Additionally the compartement can be accessed easly for head cleaning by removing the well-cover.

Level meters used on the TC-K81 are generic digital peak reading meters with multi-color indication to provide visual saturation level of tape and peak hold for easy adjustment of optimum recording level. Full-logic transport controls used on the TC-K81 let it respond to the slightest finger contact for fast and effortless transport function selection.

To ensure the best response from the wide variety of tapes available adjustment of, bias and sensitivity, to optimum levels can be performed prior to recording.

The Dolby-B system reduces tape hiss on tapes recorded on the TC-K81 by as much as 10 dB at the highest frequencies. The 19kHz multiplex pilot slgnal present in FM stereo broadcasts can cause false triggering of the noise reduction system. The switchable MPX filter of the TC-K81 filters out the pilot signal, and assuring proper Dolby processing of FM stereo programs.

To make live recordings this deck has 2 microphone inputs to connect microphones with a jack connector. For undisturbed listening a jack connector for a pair of stereo headphones is supplied. Connection to other audio components for plaback can be achieved by a RCA cable and recording from a source by a RCA cable. All main transport commands can be issued remotely with a wired remote control.

Compact Cassette
  • Sendust & Ferrite Head
  • BSL Motor
  • Closed Loop Dual Capstan
  • 3 Head

Historic events

1980 Dolby C Noise Reduction introduced by Dolby Laboratories.
1981 IBM introduces the IBM PC.

Features of Sony TC-K81

Calibration
Calibration
Manual Bias Calibration 400Hz Test Tone Manual Level Calibration 8kHz Test Tone
Connectors
Connectivity
2 Mono Microphone Inputs AC Power Cord / Plug Wired Remote Control RCA Input/Output Connectors Headphones
Display
Display
3-Digıt Mechanical Counter Peak Hold Multi Color Peak-Reading Meters Digital Peak-Reading Meters
Electronics
Electronics
Normal Frequency Bias Oscillator Record Protection
Cassette Exterior
Exterior
Silver Finish Orientation Left Front Loading
Compact Cassette
General
Stereo
Head
Head Configuration
3 Head Desiǥn 4 Track / 2 Channel
Indicators
Indicators
Cassette Back Lighting
HighCom NR
Noise Reduction
Dolby-B Noise Reduction MPX Filter
Controls
Operation
Punch-In Recording Full Logic Transport Control Line / Mic Input Select Real-Time Tape Monitoring Auto-Play Timer Recording/Playback Record Mute Memory Stop Auto-Space Removable Well Cover Damped Eject
Power
Power Requirements
Alternating Current
Preamplifier
Preamplifier
Individual Input Level Controls Output-Level Control Headphone Volume Control
Tape Speed
Speed
1⅞ ips - 4.76 cm/s
Tape
Tape
Manual Tape Type Selection Normal Tape Capabılity Chrome Tape Capabılity Metal Tape Capabılity Ferro-Chrome Tape Capabılity
Transport
Transport
2x Motor Mechanism Mechanical Tape Loading Belt Drive (Capsŧan) Auto Shutoff Dual-Capstan Transport

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Last update on Jun 19, 2024 7:26:35 PM CEST

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