Acom 1000 OPERATING MANUAL
HF + 6 m LINEAR AMPLIFIER
ACOM 1000
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Table of Contents
1. GENERAL INFORMATION ..................................3
1-1. Introduction and Description .....................................3
1-2. Owner Assistance ..............................................3
1-3. Equipment Supplied ............................................3
1-4. Features .....................................................3
1-5. Safety Considerations, Explicit Denitions ...........................4
2. INSTALLATION ............................................6
2-1. Unpacking and Initial Inspection ...................................6
2-2. Line Voltage Selection ...........................................6
2-3. Amplier Location Selection ......................................6
2-4. Connections .................................................. 7
2-5. Installation of External Fan .......................................9
3. POWER ON, CONTROLS AND INDICATORS ...................9
4. OPERATION..............................................11
4-1. Turning ON and OFF ..........................................11
4-2. Changing Operate and Standby Modes............................. 12
4-3. Tuning ......................................................12
4-4. ON LINE Information Screens and Control Functions. ................15
4-5. Auto-Protection System ........................................15
5. OFF LINE OPERATION .....................................16
5-1. Contrast and Backlighting control.................................16
5-2. Auto-Operate enabling and disabling .............................. 16
5-3. Reading Auto-protection Signatures ...............................16
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6. MAINTENANCE...........................................17
6-1. Cleaning ....................................................17
6-2. Fuses Replacement ............................................17
6-3. Tube Replacement............................................. 17
6-4. The ACOM1000 Simplied Schematic Diagram...................... 17
6-5. Troubleshooting...............................................18
7. SPECIFICATIONS .........................................20
7-1. Parameters ..................................................20
7-2. Functions....................................................21
7-3.Storage and Shipment ..........................................21
N O T E
This unit has been set for 240VAC at the factory. Means is provided, however, to
reconnect it for 200/240VAC, as well as for 100/120VAC, in 10-Volt steps.
Please contact your dealer or look at the enclosed schematic diagram whenever
a change is needed.
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N O T E
This unit has been set for 240VAC at the factory. Means is provided, however, to
reconnect it for 200/240VAC, as well as for 100/120VAC, in 10-Volt steps.
Please contact your dealer or look at the enclosed schematic diagram whenever
a change is needed.
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1. GENERAL INFORMATION
1-1. Introduction and Description
This manual explains the installation, operation, and maintenance of the ACOM1000 HF+6 meters
linear amplier.
The ACOM1000 is a complete and self-contained linear amplier that covers all amateurs bands from
1.8 through 54MHz and provides over 1000W output power with less than 60W exciter drive. Antenna
VSWR up to 3:1 is acceptable at full power. Tuning is substantially simplied by a plate-load True Resistance
Indicator (TRI) and by an automatically controlled input attenuator. Operating parameters are displayed
by a multi-functional OLED. Full break-in transmit/receive switching (QSK) is standard.
1-2. Owner Assistance
If assistance is needed, you should contact your local dealer rst. If you still have an issue you need to
discuss with one of ACOM’s specialists, the contact information is as follows: fax + 359 2 920 96 56,
tel. + 359 2 920 97 80, e-mail acom@mail.orbitel.bg or by mail: bul. Nikola Mushanov Nr.151, 1330
Soa, Bulgaria.
1-3. Equipment Supplied
The ACOM1000 amplier and this manual are shipped in a cardboard carton.
1-4. Features
• Easy to operate. The TRI is a powerful tuning aid which, together with the automatically controlled
input attenuator, helps the operator to quickly and precisely match antennas (5-10 seconds typically). The
auto-operate function (when enabled) maintains the amplier in OPERATE mode for you, thus saving
manual operations and time.
• No heavy outboard antenna tuners required for antenna VSWR up to 3:1 (and higher on some bands).
Your amplier will perform the functions of an antenna tuner, thus enabling you to change antennas faster
and use them over a wider frequency range (saving tuning time).
• An amplier that is both user-friendly, and that looks after itself. It is designed to safely withstand up
to 500W reected power, up to 100 milliseconds duration of drive spikes, drive RF “tails” after a PTT
or KEY release, operator’s inadvertent tuning errors etc. It would also not cease to function with a
“soft” AC line and would deliver more than half power at only 75% of nominal mains voltage. It would
withstand up to 10 milliseconds (down to zero) voltage drops, and up to +15% line voltage spikes,
which is important particularly when used at eld days, DXpeditions, and other portable events.
• OLED comment display. All amplier status indications are explained via detailed text displayed on
the dot matrix display OLED. The upper-line’s strip on the OLED always reads peak forward power.
LED indicators are provided for OPERATE, attenuation-on, and ON/OFF conditions.
• Easy maintenance. Signatures of the amplier internal status are stored in a nonvolatile memory for
7 most recent auto protection trips. This information can be forwarded to your dealer for diagnostics.
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Using an EXCEL APPLICATION (available from ACOM or your dealer free of charge) and a PC you can
decode the signatures by yourself, too.
• Less noise in the shack: the input bypassing and the vacuum antenna relays are virtually silent even in
QSK CW mode due to their special mounting.
• Less QRM and improved Electro Magnetic Compatibility during tuning. Antenna matching can be
achieved in less than 10 seconds at a quarter of nominal output power.
• Operates without special signals from the transceiver - “ground on TX” and 60W RF drive power
are sufcient.
• Broadband input matching circuit resulting in very good load to the transceiver over the entire spectrum
from 1.8MHz up to 54MHz.
• Uses a single 4CX800A (GU74B) Svetlana high-performance ceramic-metal tetrode with plate
dissipation of 800W (forced air cooling, grid-driven).
• Permanent monitoring and protection of plate and grid voltages and currents, as well as of the exhaust
air temperature. The Bias Optimizer decreases the heat dissipated from the tube, and there is automatic
protection against overheating in accordance with the specications of the tube producer.
• An output RF Arc protection is employed. It safeguards the amplier, antenna, antenna selector, and
tuner against severe damage in case of possible break down.
• High voltage power supply inrush current protection, which eliminates the danger of affecting sensitive
devices, connected to the same mains circuit (important when used portable). The amplier can be
congured for 8 nominal line voltages: 100, 110, 120, 200, 210, 220, 230, and 240VAC, 50 or 60Hz.
• Continuous measuring and/or selectable monitoring of 12 most important parameters of the amplier,
exciter, and antennas via LCD.
• The amplier can be shipped with 10 and 12 meters capability disabled as required by the FCC for
US users. Contact your dealer about enabling those bands.
1-5. Safety Considerations, Explicit Denitions
The ACOM1000 HF+6 meters Linear Amplier is a Safety Class I unit. The third grounding lead of its
mains cord (which is colored yellow with two green stripes) and the ground stud on the rear panel of
the amplier (marked GND) must be connected to the station’s grounding system for safe operation.
The amplier is designed to meet international safety standards and complies with CE safety and
electromagnetic compatibility requirements, as well as FCC regulations.
This operating manual contains information, precautions, indications for cautions and warnings which must
be followed by the user to ensure safe operation and to keep the ACOM1000 in safe operating condition.
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PRECAUTIONS:
The EXPLICIT DEFINITIONS described below apply to this operating manual:
W A R N I N G notes call attention to a procedure which, if not correctly performed, could result in
personal injury, re hazard or electric shock.
C A U T I O N notes call attention to a procedure which, if not correctly performed, could result in
equipment damage, not only in the amplier.
N O T E notes call attention to a procedure which, if not correctly performed, could result in
inconvenience.
W A R N I N G HIGH VOLTAGE!
The amplier works with high voltages up to 3000V, which are LETHAL!
Also, for your safety, pull the amplier power plug out of the mains wall
outlet and WAIT AT LEAST 30 minutes EACH TIME BEFORE you remove
the cover of the amplier. Do not touch any part inside while the amplier
is open because some residual voltages may still be present.
W A R N I N G HIGH VOLTAGE!
NEVER ALLOW ANYONE, ESPECIALLY CHILDREN, to push anything
into holes in the case - this will cause electric shock. NEVER TOUCH AN
ANTENNA during transmission - this may result in an electric shock or
burn. NEVER EXPOSE the amplier to rain, snow or any liquids. AVOID
placing the amplier in excessively dusty environments or in direct sunlight.
DO NOT OBSTRUCT AIR INTAKE (rear panel) and EXHAUST (top cover)
areas of the amplier. Keep a minimum distance of 10cm (4 inches) to the
intake and 50cm (20 inches) to the exhaust openings.
W A R N I N G
Do not undertake on your own repairs or changes in hardware or software
of the amplier. Otherwise you may endanger your or other’s health and
life or damage the amplier and the equipment connected with it, not
covered by warranty. The manufacturer is not liable for another ’s actions
and responsibility shall be assumed by the doer.
C A U T I O N
To avoid damage (not covered under warranty) read the Installation - Section 2 of this
operating manual carefully. If you have any doubts about the installation, operation
or safeties of the amplier please consult your dealer.
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2. INSTALLATION
2-1. Unpacking and Initial Inspection
N O T E
Before you start to install the amplier, thoroughly read this manual. First, carefully
inspect the cardboard carton and its contents for physical damage. If damage is
noticed, notify your dealer immediately. Delay may infringe carrier’s warranty
conditions. Keep all packing for possible future transportation!
2-2. Line Voltage Selection
C A U T I O N
To avoid damage (not covered under warranty), check carefully if the voltage for
which the amplier is set corresponds to your mains nominal voltage.
Normally the amplier is supplied set for a nominal line voltage of 240V. There might be exceptions in
cases of special delivery and then the voltage set is noted in the Table of Individual Data (Table 2-1). If
your power line has a different nominal voltage, it will be necessary for you to contact your dealer.
Voltage Selector
AMP s/n
Tube s/n
VAC
Table 2-1. ACOM 1000 Individual Data
2-3. Amplier Location Selection
C A U T I O N
The weight of the unit is about 22kg, which should preferably be handled by two
persons.
Position the amplier near the place where it will be used. You’ll need an easy access to the command
knobs and indicator’s area, as well as to the rear panel cabling.
No magnetic-eld sensitive devices should be located next to the right side of the amplier as its power
transformer is located there. It’s best to position it to the right of your transceiver. No temperature
sensitive devices should be located above the exhaust hot air area, so don’t push it under a shelf. You
may prefer to use the bottom scales of both variable capacitor knobs (TUNE and LOAD) if you install
it on a shelf. DO NOT OBSTRUCT AIR INTAKE (rear panel) and EXHAUST (top cover) areas of
the amplier. Keep a minimum distance of 10cm (4 inches) to the intake and 50cm (20 inches) to the
exhaust openings.
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