Professional Transportable Recorder 77 Mk IV (4)

Plessey 77 Mk IV 

The Plessey 77 Mk IV is a professional, transportable magnetic tape recorder engineered for high-reliability studio and broadcast environments. Manufactured by Plessey Electronics Pty. Ltd. in Australia, it continues a tape recorder lineage originally developed by Byer, later produced by Rola, and subsequently by Plessey and CEI.

• The deck features a rugged three-motor transport system that enables direct-drive tape movement in both recording and playback modes, eliminating drive belts and maximizing tape handling stability.
• It uses a full-track, three-head configuration with dedicated erase, record, and playback heads, providing simultaneous erase, record, and replay across the full width of standard ¼-inch tape, which minimises drop-out and tape hiss.
• A two-speed capstan motor supports professional standard tape speeds of 7.5 ips and 15 ips, aided by a heavy flywheel for exceptionally smooth operation and minimized wow and flutter.
• Inputs accommodate both line-level and microphone sources, while low-impedance outputs are designed to interface with standard 600-ohm broadcast lines.
• Tape transport controls feature color-coded pushbuttons, with optional remote control and an electronically regulated shuttle speed for fast and accurate cueing.
• The machine is available in a rack-mount form factor for fixed studio installations, as well as portable versions for field work.

Production of the 77 Mk IV transitioned to Consolidated Electronic Industries in the mid-1970s, with only minor changes, maintaining its reputation as a workhorse professional recorder.

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