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1.2.3.
Indicators
There are couples of LED and bar graph indicators visible on the front panel to inform you
about value of some parameters or operation status:
Bar graph indicators
Power output - 50 LED
Reflected power – 20 LED
Current at screen Ig2 – 10 LED
Anode voltage, anode current, tuning – 30 LED
LED Indicators
Current at control grid (Ig1 – 2 LED)
WAIT – preheating of tube (180 sec)
STBY – standby
OPR – operation condition
FAULT – failure, switching off for abt. 2 sec
2. SAFETY INSTRUCTIONS
WARNING!
DANGEROUS HIGH VOLTAGE!
The power amplifier is using high voltage up to 3400V DC, which is very dangerous for
human life! Read next safety instructions carefully first, before you will start to install
and operate power amplifier! NEVER VIOLATE NEXT RULES!
WARNING! NEVER ALLOW CHILDREN to play around PA or to touch power
amplifier or connected cables in working condition, or to push anything into the case
holes!
WARNING! The amplifier contains high voltage circuits. Never turn the amplifier on
without the upper lid in place. DO NOT ATTEMPT TO SHORT OR BYPASS safety
switch under upper lid!
WARNING! The OM4000 HF amplifier is neither to be used in a WET or HUMID
environment nor to be exposed to RAINFALL!
WARNING! Do not turn the amplifier on without having connected the ANTENNA or
properly rated DUMMY LOAD! A hazardous HF voltage may build up on the antenna
connector after turning the amplifier on with no antenna or dummy load connected!
