5
ALWAYS THINK
SAFETY
__________________________________________________
THIS LINEAR AMPLIFIER DESCRIBED IN THIS MANUAL CONTAINS VOLTAGE
HAZARDOUS TO HUMAN LIFE AND SAFETY WHICH IS CAPABLE OF
INFLICTING PERSONAL INJURY. NEVER OPERATE THE AMPLIFIER WITH THE
TOP COVER REMOVED AND THE TOP COVER SAFETY SWITCH DEFEATED.
BEFORE REMOVING THE TOP COVER MAKE SURE THE AC LINE POWER
CORD HAS BEEN DISCONNECTED FROM THE AC POWER SOURCE. ALLOW A
MINIMUM OF 5 MINUTES TO ELAPSE BEFORE REMOVING THE TOP COVER
AFTER POWER HAS BEEN REMOVED. THIS IS NECESSARY TO ALLOW THE
PLATE VOLTAGE FILTER CAPACITORS TO BLEED DOWN TO A SAFE LEVEL.
If this amplifier is to be powered from the AC line (mains) through an autotransformer (such as a
Variac or equivalent) ensure that the common connector is connected to the neutral (earth pole) of
the power supply.
Before operating this unit ensure that the protection conductor (green wire) is connected to the
ground (earth) protective conductor of the power outlet. Do not defeat the protective features of
the third protective conductor in the power cord by using a two conductor extension cord or a
three-prong/two-prong adapter.
Before operating this unit:
1. Ensure that the instrument is configured to operate on the voltage available at the
power source.
2. Ensure that the proper fuses are in place in the amplifier's AC line fuse holders located
on the rear panel.
3. Ensure that all other devices connected to or in proximity to this amplifier are properly
grounded or connected to the protective third-wire earth ground.
If at any time the amplifier shows visible damage, has sustained stress, emits a foul smell,
fails to operate satisfactorily, it should not be used until its performance has been checked
by qualified service personnel.
Summary of Contents for HF-3KDX
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