Q-Master (1973)
Thorn Lighting

Q-Master 2000 at the Garrick Theatre London

From 1974 catalogue
An Economic Wide Range system for smaller stage lighting control applications.
This is the very latest and most important addition to the Thorn range of theatre and television lighting control systems. By exploiting fully the vast potential of modern semiconductor devices our design team have produced an extremely flexible full facility control system which includes memorised brightness levels for all lighting circuits and can be produced at a price which commends its use in even the smaller theatre or TV studio. It thus goes a very long way towards closing the gap between simple conventional control systems and the lighting man's dream of Q-File which is ideal for larger installations but is frequently too expensive for the average small scale user. It is therefore little wonder that the arrival of Q-Master was an exciting event in the history of the Theatre Lighting Division and this system is now enjoying the sort of success which enabled Q-File to place Thorn in the forefront of manufacturers of equipment of this type.
Summary of Facilities

Up to 160 Lighting Circuits.
Dimmer Level Memories!
Independent Group Master
Automatic and/or Manual Fades.
Fade within Fade Facilities.
Independent Manual Control of alli Lighting Circuits.
Simple to Install - Just a Desk and the Dimmer Cabinets.
Transportable - May be taken on tour
Rapid First Line Servicing by Electrical Staff - No Special Electronic Knowledge is Required

The last feature is of particular importance to theatre users where the absence of specially trained maintenance personnel can present difficulties in the event of a breakdown.
In common with other Thorn control systems. Q-Master is used in conjunction with a choice of thyristor or triac dimmer units having load capabilities of 2.5, 5 or 10kW. These are housed in cabinets each containing up to 40 dimmers and the individual units can be supplied as plug-in modules or as cheaper wired- in versions.

From 1978 catalogue
Two versions Q-Master 1000 and 2000, offer up to 160 channels and 50/100 electronic memories or up to 240 channels with unlimited disc memories. ln each version all control equipment excluding dimmers is housed within the desk. Principal Features

lndividual channel faders for setting up memories.
Channels can be returned lo manual control singly or together at any time.
Complele lighting state instantly recorded in any selected memory.
|ndependent simultaneous memory playback via three master faders.
Memory addition and subtraction facilities.
Automatic fades and crossfades.
Blind plottìng and memory modification facility.
Mimic lamps show status of active channels.
Stand by manual control.
Direct manual to playback transfer allows use as a three preset system without involving the memories.

Q-Master 1000
Very suitable for small to medium theatre or television applications where full memory facililies are required.

40 to 160 channels with choice of 50 or 100 electronic memories.'

Q-Master 2000
Specially designed for medium to large theatre applications requiring large memory capacity with repertoire 'library' storage of lighting plols.