Original price was: €1,338.00.Current price is: €1,250.00.

Ships in 7 days–Strongly recommended with A500–700S, the 1200S & 2020 amplifiers for super safe, simple & reliable operations every time.

Available on backorder



  • Remote matching of antennas – fewer losses in the feed line. Designed for installation in a shack, under a shed, or in open (see mounting kit options). Can be distanced up to 100 m (330 feet) from the amplifier.
  • Powered and controlled directly from the ACOM solid state HF+6m amplifiers through the amplifier RF output cable only – there is no need for power or control cables between the shack and the tuner.
  • Provides automatic or manual antenna change and automatic antenna impedance matching to the ACOM solid state HF + 6m amplifiers, controlled entirely from the amplifier front panel and your transceiver CAT. or via your remote PC.
  • Guards the transceiver and amplifier against excessive impedance mismatch during the tuning process.
  • Operates with two types of tunings: full tuning (basic matching cycle) and fast tuning (retrieving user tuning patterns from nonvolatile memory.
  • Full tuning is 100% automated however a cycle is initiated only by the operator. User tunings track the antenna and frequency changes automatically during amplifier and transceiver operation.
  • Four typical antenna types: Regular, Sharp, Wide, and Fixed-frequency are available so the operator can adapt the frequency segment width to the specific antenna bandwidth; BYPASS mode is also available.
  • Antennas appear with a number, type, and user-editable name on the ACOM solid state amplifiers screen.
  • Tuning availability is presented by a graphic scale on the ACOM solid state amplifiers screen.
  • Plenty of antennae- and tuner-related information is available on the ACOM solid state amplifier screen: menus ATU SERVICE, ATU MEASURE, ATU TUNINGS LOOKUP/ERASE, Resource-estimate function, etc.
  • Tuning “age” warning can be set to warn you when you attempt to use an outdated tuning. to retune is a simple one-touch function.
  • The user can archive all tunings from nonvolatile memory in a computer file as well as upload earlier archived files in the ACOM 04AT nonvolatile memory through the ACOM solid state amplifier’s RS232 port.
  • Protections: PS voltage, Reverse PS polarity, Excessive RF voltage, RF current or reflected power at the antenna outputs, Excessive tuning power, Excessive Input power, Hot switching of relays, Overheating, etc.
  • Protected against the building up of static electricity in the antennas via bleeding resistors and against close lightning strikes via gas-filled discharger; unused antennas are directly grounded during operation as well as all antennas are grounded when the ACOM 04AT is powered off.

Additional information

Weight10.00 kg

Frequency coverage: 1.8 to 30MHz and 50 to 54MHz, continuously (30 to 50MHz on request).
Antenna impedance matching capability: all impedances with 50 Ohm-SWR between 1:1 and 3:1; (for some higher-SWR impedances matching is also possible see power limitations below).
Maximum RF Input power admissible, average or continuous (no mode limitations; in brackets – PEP):







Pin, W







* (when tuning is possible for SWR above 3:1)

Rem: Operation at SWR above 10:1 is not permitted even though matching could be possible in some cases.
RF Input characteristics:
-Nominal impedance: 50-Ohm unbalanced;

-Connector type: UHF/PTFE (S0239A);

-Input SWR during full tuning (basic matching cycle): below 2:1

-Input SWR soon after full tuning: less than 1.5:1 (below 1.3:1 typ.).

Antenna output characteristics:
-Nominal impedance: 50-Ohm unbalanced;

-Connector type: UHF/PTFE (S0239A);

-Number of outputs – 4;

-Antenna SWR: between 1:1 and 3:1 for 100% matching, full power; for higher-SWR impedances (provided matching is possible) see power limitations above).

Full tuning duration (basic matching cycle):
-Below 10MHz: less than 5s (2-3s typ.)

-Above 10MHz: less than 3s (1-2s typ.).

RF Input power required during full tuning: 25W +3/-3 dB (12.5 to 50 W), non-modulated.
Power supply and control: available from the ACOM solid state HF+6m amplifiers through RF-output coaxial cable; +26VDC, up to 25 W consumption; control data using a FSK modem at 60 kHz.
Coaxial cable maximum length (same for RF power, DC power supply, and control):
-100 m (330 feet) for cable type RG-213.

Size and mass (operating)

– Width: 345mm (13.6”)

– Depth: 250mm (9.9”)

– Height: 190mm (7.5”)

– Mass: 4.2kg (9.25lbs).

Operating environments:
-Weather protection: IP 53 (NEMA Type 3);

-Temperature range: -40 to +65 degrees C (-40…+150F);

-Humidity: up to 98% @ +40 degrees C (104F);

-Height ASL without parameters deterioration: up to 3050 m (10 000 feet).



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