AMERITRON AL811 Schnellstart-Handbuch - Seite 4
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METERING FUNCTIONS
The AL-811 has two illuminated panel meters. The right meter
reads PA grid current up to 200mA. The normal current with a
single tone (carrier) signal will be around 150mA. If the current
is too high during full power operation, the loading control
should be advanced to a higher setting.
LOCATION
Do not operate the amplifier in excessively warm locations or
near heating vents or radiators. Be sure air can circulate freely
around and through the amplifier cabinet.
unobstructed air inlet for the blower. Do NOT place any books,
magazines or equipment that will impede the free flow of air
near the sides of the cabinet.
VENTILATION
The AL-811 ventilation system has been designed and tested to
maintain the 811A tube temperature safely below the tube
manufacturer's rating at 400 watts output with a 100% duty
cycle. To insure proper ventilation in you installation, observe
the following:
1.
Do not block or restrict the ventilation holes in the cover.
2.
The exhaust air flow is over 20 CFM. Do not "assist" the
air flow unless the fan exceeds the AL-811 fan CFM by a
factor of 2:1.
3.
Do not mount additional fans on the AL-811 cabinet.
4.
The exhaust air will become warm at high power levels. Do
not place any heat sensitive objects in the exhaust air
stream.
GROUNDING
Connect a good earth or water pipe ground to the ground post on
the rear panel of the amplifier. Use the heaviest and shortest
connection possible.
Before you use a water pipe ground, inspect the connections
around the water meter and make sure that no plastic or rubber
hose connections are used. These connections interrupt electrical
continuity to the water supply line. Install a jumper around any
insulating water connections you may find. Use heavy copper
wire and pipe clamps. It is best to ground all equipment to one
point at the operating position and then ground this point as
described above.
POWER CONNECTIONS
The AL-811 is supplied with a NEMA 5-15P plug for 120V
operation. The power required to operate the AL-811 is not
high enough to warrant 240V operation unless 120V is not
available. The fuses should be 12 ampere fuses for 120V and
must be changed to 8 amperes for 240V operation. The diagram
to the right shows the proper wiring for 120V operation.
If the current is too low, the loading control should be turned to
a lower setting. The left meter reads PA high voltage of 2000
volts and plate current of 750mA. The normal readings are
1500-1700 volts HV and 550mA of current at full rated output
with a single tone signal.
INSTALLATION
Operation on a voltage of 240V is not required, nor will it
necessarily improve performance. The power transformer will
perform equally well with a power line frequency of 50 Hz or 60
Hz. The Transformer Connections chart at the bottom of this
Provide an
page shows proper connections for various line voltages.
The AL-811X (export model) is wired for 240V, 50/60 Hz
operation. The appropriate plug is not provided for this model.
You must wire the proper plug on the end of the power cord
supplied.
appropriate plug in its place. If the line voltage in your country
is not 240V, then you must change the transformer to the
appropriate setting indicated by the chart below. Note: the AL-
811 transformer allows operation on 100V line voltage in
countries such as Japan.
NEVER REWIRE THE POWER SUPPLY TO BOOST
THE HIGH VOLTAGE ABOVE 1800 VOLTS.
The wiring between the fuse box and the amplifier AC outlet
must be 14 gauge or larger in order to supply the operating
current required (8 amperes) without a significant drop in the
line voltage. The outlet should be fused for the wire gauge used.
* Factory wired operation for the AL-811
** Factory wired operation for the AL-811X
VOLTAGE
For 240, 230, 220 all three primary conditions apply ¯
Simply cut the existing plug off and wire the
BUCK BOOST
* 120
A to 1, B to 2
110
1 to 2, (A,B open)
100
A to 2, B to 1
** 240
A to 1, B to 2
230
1 to 2, (A,B open)
220
A to 2, B to 1
PRIMARY
C to D, E to F
C to D, E to F
C to D, E to F
no connection C to D
D to E
no connection E to F
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