ACOM 1003 HF + 6 meter Linear Amplifiers

ACOM 1003 HF + 6 meter Linear Amplifiers are self-contained, full-featured units that cover all amateur bands from 1.8 MHz to 54 MHz. With less than 80 watts input, they deliver 1000 watts PEP output or 900 W continuous carrier using a single ceramic/metal power triode 3CX800A7. ACOM 1003 models have two new front panel relay switches, one to select from three antenna outputs and another to quickly engage and disengage an input attenuator for rapid tuning without transceiver adjustment. A multitude of advanced features in this compact and affordable amplifier validates its admirable design.

ACOM 1003 Amplifiers are available from DX Engineering in three versions:
•AOM-1003-240 Tested with a pre-installed NEMA 6-15P for 240 VAC at 8.5A (10A fuses)
•AOM-1003-120 Tested with a pre-installed NEMA 5-15P for 120 VAC at 15A+ (20A fuses)
•AOM-1003 Install your own plug, reset voltage taps internally, 10A fuses supplied


The ACOM1003 HF+6M Linear Amplifier is amazingly easy to operate!
•True Resistance Indicator (TRI) bar scale meter: Simplifies accurate adjustment of plate-load impedance controls.
•Two-line OLED Display: Provides a peak power bar graph meter, 18 unique operational parameters and text status messages.
•External Tuner Not Needed: For antenna SWR up to 3:1, even at 1000 W output.
•Front-panel Input Attenuator: Instantly reduces input power when tuning, eliminating the need for transceiver power adjustments.
•Silent HF Reed Relay: Enables Fast T/R switching for QSK CW.

Additional features and protection:
•Operator selectable class AB2 mode for best linearity in SSB mode or class B for reduced plate dissipation in continuous digital modes.
•Operator selectable Full 100% or 50% power output with no efficiency deterioration.
•Auto controlled air flow tube cooling.
•Continuous monitoring of amplifier parameters and tube protection.
•Able to monitor 18 operator-selectable amplifier parameters on the display.
•Unique ACOM protection for the bands switch.
•Factory tuned input lowpass filters for best linearity and input SWR less than 1.3 in each amateur radio band.

-OLED comment display – Two-line OLED display with peak-reading forward-output power bar graph and 18 operator-selectable amplifier parameters on the display.

-Three antenna outputs – Three antenna outputs are selectable by a push-button on the front panel.

-Less noise in the shack – HF antenna reed relay for a virtually silent, QSK compatible CW operation.

-Transceiver-independent – The amplifier operates without special signals from the transceiver - "Ground on TX" (PTT) and 50-80 W RF drive power are sufficient.

-Single tube operation – Uses a single ceramic/metal power triode 3CX800A7 in cathode driven, grounded grid configuration.

-Tube protection – Continuous monitoring of amplifier parameters and tube protection.

-Output RF arc protection – Original ACOM HF arc protection at the output, or at the antenna.

-Power supply – Single phase mains power, 90-132 / 180-264 VAC at 50-60 Hz, power consumption at rated output – up to 2000 VA @ 240 VAC. Internal taps for 8 nominal AC mains voltages: 100, 110, 120, 200, 210, 220, 230 & 240VAC, ±10% tolerance), 50-60 Hz, single phase.

-Easy maintenance – Non-volatile memory with SIGNATURE records eight of the most recent Serious (Hard Fault) Protection events.

-Documentation – The User's Manual is available as a PDF file only. The latest version is available under the Download tab (see above). ACOM creates and distributes its documentation in ENGLISH language only.
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