9
2-5. Installation of External Fan
This fan (Fig. 2-1) is not necessary in SSB and CW modes, nor in continuous carrier modes (RTTY, SSTV
etc.) with carrier down times of maximum 15 minutes and a subsequent pause of 3 minutes. For higher
duties or ambient temperatures the fan is recommended. The auxiliary fan (92x92mm) must be brushless
type, 2...5W/24VDC. It may be installed by your dealer or by the manufacturer on request.
3. POWER ON, CONTROLS AND INDICATORS
C A U T I O N
Do not turn the amplifier on for at least 2 hours after unpacking it in the room
where it will be used. Pay particular attention when you move it from a very cold
into a very warm place - condensation is likely and this could result in damage to the
high voltage circuits. In such a case, wait at least 4 hours. A similar effect can occur
after a rapid warming of the operating room (for instance after switching on a
powerful heater in a cold shack).
C A U T I O N
To avoid damage (not covered under warranty) carefully check that the voltage for
which the amplifier is set corresponds to your mains nominal voltage (see S.2-2 and
table 2-1).
After following all instructions in S.2, you can turn ON the main power switch marked LINE on the
rear panel (Fig.2-1). The red LED indicator above the red ON/OFF button located on the front panel
must light red and a black inscription ACOM1000 will appear on the LCD (Fig.3-1):
Fig.3-1 ACOM1000 Display and Control
Youll note that the upper line of the LCD always reads directly peak forward power, even while the
tube is not driven. The 1200W scale resolution is 10W per bar, dots division weight is 60W, and figures
are multiple to 300W. Note also that levels below 20W may be not detected.
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