These two views show the control room in its original form - no add-on boxes
yet! In the foreground in the above picture is the Assistant Technical Operations
Manager's desk. Beyond that is the 'front bench' and above it the routing
display.
At the right of the front bench is the Simultaneous Broadcast (SB) position.
This was the main point of contact with regional centres and transmitters.
The keys of the continuity interchange are on the far right and the engineering
manual exchange (EMX) is on the left. Monitoring buttons and the all important
control room intercom take up most of the remaining panels.
Next comes the miscellaneous switching position (MSP). The large bank of
bridged silver locking keys were used to drive the selectors feeding outgoing
lines, frequently used outside sources and recording channels. A common
marking panel is below - the second one is a spare. You would punch out
the code, grasp the silver key and locate the appropriate indicator on the
main display above. A quick check to make sure you had the right key and
then a momentary flick down to drive the selector. If the indicator you
were watching didn't change you were probably in trouble!
Next, surrounded by monitoring buttons comes the main EMX. When studios
rang the control room this was generally where their call appeared. Selector
alarms are round to the far left. Should a selector fail to stop, someone
would have to dash down to the selector room and remove its power supply.
At this time the large PPMs carried "slugged" displays of Home, Light ,
Third and TV sound.