Optonica RT-6506
Dolby B NR Metal Tape

This Optonica RT-6506 is a stereo cassette deck with Dolby B noise reduction, it was first sold by Optonica in 1980 with a recommended retail price of USD $400 and discontinued a year later.

The main features of the Optonica RT-6506 are: 2 heads, digital tape counter with 4 digits, manual tape type selection and capable of handling normal, chrome, ferro-chrome and metal tapes, belt driven single-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.

Level meters used on the RT-6506 are generic digital peak reading meters with peak hold for easy adjustment of optimum recording level. Mechanical transport controls for reliable RT-6506 transport function selection.

The Dolby-B system reduces tape hiss on tapes recorded on the RT-6506 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 RT-6506 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.

Compact Cassette
  • APLD (Auto Program Locate Device)
  • OPTO Peak Level Display

Historic events

1980 3M, Mitsubishi, Sony and Studer each introduce a multitrack digital recorder.
1981 IBM introduces the IBM PC.

Features of Optonica RT-6506

Connectors
Connectivity
2 Mono Microphone Inputs RCA Input/Output Connectors Headphones
Display
Display
Track Indicator Digital Peak-Reading Meters Peak Hold 4-Digıt Digital Counter Digital Clock
Cassette Exterior
Exterior
Orientation Left Black Finish Front Loading
Compact Cassette
General
Stereo
Head
Head Configuration
2 Head Desiǥn 4 Track / 2 Channel
Indicators
Indicators
Dolby B
HighCom NR
Noise Reduction
Dolby-B Noise Reduction MPX Filter
Controls
Operation
Music Scan Mechanical Transport Control Timer Recording
Preamplifier
Preamplifier
Microphone Level Adjust (Left/Right) Individual Input Level Controls Output-Level Control
Tape Speed
Speed
1⅞ ips - 4.76 cm/s
Tape
Tape
Manual Tape Type Selection Ferro-Chrome Tape Capabılity Normal Tape Capabılity Chrome Tape Capabılity 2-Position Equalization Selector Metal Tape Capabılity
Transport
Transport
Auto Shutoff Mechanical Tape Loading Sìngle Capsŧan Transport Belt Drive (Capsŧan)

Similar to Optonica RT-6506 from the period 1980 - 1981

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