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1. GENERAL INFORMATION
1-1. Introduction and Description
This manual explains the installation, operation, and maintenance of the ACOM1500 HF+6
meters linear amplifier.
The ACOM1500 is a complete and self-contained linear amplifier that covers all amateur
bands from 1.8 through 54MHz and provides over 1500W PEP (1200W continuous carrier)
output power with less than 85W exciter drive. Antenna VSWR up to 3:1 is acceptable at full
power. Tuning is substantially simplified by a plate-load True Resistance Indicator (TRI) and
by an automatically controlled input attenuator. Operating parameters are displayed by a
multi-functional high brightness vacuum fluorescent display (VFD). Full break-in
transmit/receive switching (QSK) is standard.
1-2. Owner Assistance
If assistance is needed, you should contact your local dealer first. 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 96 55, e-mail [email protected] or by mail: bul.
Nikola Mushanov Nr.151, 1330 Sofia, Bulgaria.
1-3. Equipment Supplied
The ACOM1500 amplifier 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 amplifier
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 amplifier 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 amplifier that is both user-friendly, and that looks after itself. It is designed to safely
withstand up to 300W reflected 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 85% 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 field
days, DXpeditions, and other portable events.
•
VFD comment display. All amplifier status indications are explained via detailed text
displayed on the dot matrix high brightness vacuum fluorescent display (VFD). The
upper-line's strip on the VFD always reads peak forward power. LED indicators are provided
for: OPERATE mode, attenuation-on (ATT), transmit request (TX), the selected antenna
output (1, 2, or 3), and ON/OFF conditions.
•
Antenna selection. Three antenna outputs are selectable using a button on the front
panel.
•
Easy maintenance. Signatures of the amplifier 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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