5
Chapter 3
Operation
Preliminary
Environment
Power Amplifier Type 2719 is designed for operation at ambient temperatures between 5 and
40
°
C (41 to 104
°
F). Operation at full power will cause the Power MOS Output Transistors’ heat
sink to heat up. This is normal. However, it is important to ensure a free flow of cooling air
through the input vent in the top cover to the output vent in the back panel, otherwise the input
drive signal will be automatically blocked and Type 2719 will shut down to prevent overheating
of the transistors.
Rack Mounting
Power Amplifier Type 2719 is designed to fit into 19
″
standard rack system. It may be used
free standing on its four rubber feet, however, when fitted in a instrumentation rack, the rubber
feet must be removed.
System Checks and Connections
Before connecting a mains supply, the following system checks and connections should be
carried out to ensure the correct function and safe operation of the apparatus.
WARNING:
Disconnect all power from the amplifier before removing or replacing its
protective panels. Internal adjustments with mains power connected should only be carried out
by skilled persons who are aware of the hazards of dealing with live circuitry.
Output Connections
The amplifier’s Output socket (on back panel) accepts a 4-pin Neutrik
®
Speakon
®
plug. The