AMERITRON AL-572, Instruction Manual

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Ameritron AL-572 Instruction Manual
14
INSTALLATION GUIDELINES AND SUGGESTIONS
L
OCATION
O
F
T
HE
A
MPLIFIER
Do not install the amplifier in excessively warm locations or near heating vents or radiators. Be
sure air can circulate freely around and through the amplifier cabinet. Provide an unobstructed
cold air inlet for the amplifier.
DO NOT place any books, magazines or equipment that will
impede the free flow of air near or on the cabinet ventilation holes.
V
ENTILATION
The AL-572 ventilation system has been designed and tested to maintain tube seal temperatures
safely below the tube manufacturer's rating at 600 watts of continuous carrier or 1300 watts of
two tone power output when the amplifier is properly tuned. The fan in the AL-572 is a
permanently lubricated type that requires no maintenance in normal operation. To insure
adequate cooling in your installation, please observe the following:
1. Do not block or unduly restrict the ventilation holes in the cover. Be sure that the amplifier is
located in an area so the ventilation holes have open air circulation. It is particularly important
to avoid restricting the air inlet.
2. The exhaust airflow is over 30 CFM. Do not "assist" the exhaust airflow with cabinet
mounted fans.
3. The most efficient way to improve airflow is to pressurize the air
inlet
area. Be sure that any
fan used to assist the inlet airflow has at least a 60 CFM rating.
4. The exhaust air will become quite warm at high power levels. Do not place any heat sensitive
objects in the exhaust air stream.
P
OWER
C
ONNECTIONS
The AL-572 is supplied with a NEMA 5-15P plug for 120 Vac operation. Full duty cycle
operation with ac supply voltages below 100 volts is not recommended. The "
T
RANSFORMER
C
ONNECTIONS
" section on page 15 show the correct wiring for various supply voltages.
This amplifier has a current demand of 16 amperes at 120 Vac with 1000 watts of RF carrier
output. The average power line current during voice peaks on SSB will be approximately 9
amperes at 1300 watts PEP output. Most normal residential power lines and house-wiring will
easily meet this current requirement.
If the power mains have excessive resistance, the high voltage may sag to less than 2500 volts
under load. Voltage sag will not hurt the amplifier if the fully loaded high voltage remains above
2350 volts.
CAUTION: Never allow the high voltage to exceed 3000 volts under
any condition.