WhitakerAudio JC Whitaker 20 W Stereo Integrated Audio Amplifier, Manual

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20 W Stereo Integrated Audio Amplifier
9 Safety Considerations
Electrical safety is important when working with any type of electronic hardware. Because
vacuum tubes operate at high voltages and currents, safety is doubly important. The primary areas
of concern, from a safety standpoint, include electric shock and hot surfaces of vacuum tube
devices. Table 9.1 lists required precautions for persons working around high voltages.
All persons working around high-voltage equipment should be familiar with first aid
treatment for electric shock and burns. Always keep a first aid kit on hand. Obtain detailed
information from the local heart association or Red Cross chapter. Personalized instruction on
first aid usually is available locally.
It is advisable to wear glasses or other protective eye wear when building or working on
electronic equipment. Injuries can result from solder splashes, cleaning chemicals, and other
unexpected events. When trimming the leads of a component, be careful to hold the excess length
so that when cut the lead does not fly towards the face.
Table 9.1 Safety Practices for Working Around High Voltage Equipment
Remove all ac power from the equipment. Do not rely on internal switches to remove dangerous ac.
Discharge all capacitors using a grounded probe.
Do not remove, short-circuit, or tamper with interlock switches on access covers, doors, or enclosures.
Keep away from live circuits.
Allow any component to completely cool-down before attempting to replace it.
If a leak or bulge is found on the case of an electrolytic capacitor, do not attempt to service the part until it
has completely cooled.
Avoid contact with hot surfaces within the system.
Know your equipment and do not take chances