Delay Loop Recorder

This recorder uses a loop of recording tape with 3 different lengths: 150 inch (380 cm.), 112 inch (285 cm.) and 75 inch (190 cm.). Tape height: 1 inch (2.54 cm.).
It can work with two speeds: 7½ inch/sec (19 cm/sec) and 3¾ inch/sec (9.5 cm/sec).
Fourteen channels, each with his own transistored amplifier.

Used to record and playback audio signals or transients
40, 30 or 20 seconds of recording time with the lower speed. 20, 15 or 10 seconds with the higher speed.

In questo link sono elencati 5 modelli, di cui 2 con immagini e 0 con schemi.
Elenco delle radio e altri apparecchi della Gresham Lion Electronics Ltd.; Hamworth Middlesex