Sharp RT-1155
Dolby B NR

The Optonica RT-1155 is a stereo cassette deck with Dolby B noise reduction, it was introduced by Optonica in 1977 with a list price of USD $180 and discontinued 2 years later in 1979.

The main features of the Optonica RT-1155 are: 2 heads, analog 3 digit tape counter, manual tape type selection with support for normal, chrome and ferro-chrome tapes with additional manual equalization selection, 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-1155 are analog needle VU reading meters with peak indicator for easy adjustment of optimum recording level. Mechanical transport controls for reliable RT-1155 transport function selection.

The Dolby-B system reduces tape hiss on tapes recorded on the RT-1155 by as much as 10 dB at the highest frequencies.

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
  • APSS (Auto Program Search System)

Historic events

1977 AT&T completes it prototype of cell phone technology.
1978 The first satellite in the modern Navstar Global Positioning System (GPS) is launched.
1979 Introduction of the Australian made Fairlight Computer Musical Instrument, the first polyphonic digital sampling synthesiser.

Features of Optonica RT-1155

Connectors
Connectivity
2 Mono Microphone Inputs AC Power Cord / Plug RCA Input/Output Connectors Headphones
Display
Display
3-Digıt Mechanical Counter Analog Needle Meters
Cassette Exterior
Exterior
Silver Finish Orientation Left Front Loading
Compact Cassette
General
Stereo
Head
Head Configuration
2 Head Desiǥn 4 Track / 2 Channel
Indicators
Indicators
Record Peak Indicator Dolby B Cassette Back Lighting
HighCom NR
Noise Reduction
Dolby-B Noise Reduction
Controls
Operation
Line / Mic Input Select Mechanical Transport Control
Power
Power Requirements
Alternating Current
Tape Speed
Speed
1⅞ ips - 4.76 cm/s
Tape
Tape
Manual Tape Type Selection Ferro-Chrome Tape Capabılity Normal Tape Capabılity Manual Tape Equalization Chrome Tape Capabılity
Transport
Transport
Mechanical Tape Loading Auto Stop Sìngle Capsŧan Transport Belt Drive (Capsŧan)

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Last update on Mar 28, 2024 12:11:40 PM CET

Similar to Optonica RT-1155 from the period 1977 - 1979