ACOM 06AT Automatic Antenna Tuners

• The ACOM 06AT Automatic Antenna Tuner works exclusively with ACOM solid-state amplifier models 500S, 600S, 700S, 1200S and the 2020S*. Covering the Amateur Radio bands 160 through 6 meters, the 06AT is designed to impedance match the antenna selected by the built-in, four-port antenna switch.

  This tuner will automatically select one of the four available antenna outputs (as assigned by the operator) and matches the impedance of the chosen antenna output by transforming it to 50 Ohms with SWR below 1.5 at the tuner input (typically below 1.3), providing an optimum load impedance for the amplifier.

  Automatic Antenna Matching provides automatic or manual antenna switching along with automatic antenna impedance matching to the ACOM solid state amplifiers, controlled entirely from the amplifier's front panel and the transceiver frequency, via CAT, COM or CI-V interface cable (not supplied).

  With its selectable frequency segments, the operator can select between four typical antenna profiles according to the bandwidth of the connected antenna: Narrow, Normal - Regular, Broadband – Wide and Fixed frequency can be used so the operator can adapt the frequency segment width to the specific antennas bandwidth. BYPASS mode is also available.

  The ACOM 06AT operates in two tuning modes: Full tuning mode, a basic matching cycle or fast tuning mode that retrieves previous tuning results from non-volatile memory. The Full tuning mode is 100% automated, once the cycle is initiated only by the operator. During subsequent operations, the antenna and frequency changes automatically during amplifier and transceiver operation. A tuning "age" warning can be set to warn you when you attempt to use an outdated tuning. The operator can archive all tuning information from the tuner’s non-volatile memory to a computer file as well as upload earlier archived files from the ACOM 06AT non-volatile memory through the ACOM solid state amplifier's RS-232 port.


• An abundance of tuner and antenna-related information is available on the amplifier's built-in LCD screen keeps the operator informed with important information and menu options such as ATU Service, ATU Measure, ATU Tuning Lookup/Erase and Resource-estimate functions. Antennas are displayed on the LCD screen with a number, type, and user-editable name and tuning availability are displayed by a graphic scale.
  
  The ACOM 06AT receives power and control functions directly from a connected ACOM Solid State Amplifier through the amplifier's RF output cable, no other cables are needed between the tuner and amplifier. Fully automated operation requires a CAT, COM or CI-V frequency reading interface cable between the transceiver and amplifier, a user built or an optional accessory. (Interface cables that carry only band data are not compatible with the 06AT). Built-in protection features protect the transceiver and amplifier against excessive impedance mismatch during the tuning process and monitor for proper power supply voltage, reverse power supply polarity, excessive RF voltage, RF current, reflected power at each of the antenna outputs, excessive tuning power, excessive Input power, hot switching of relays and overheating. Bleeding Resistors and a Gas-Filled Discharger protects against the build-up of static electricity and lightning strikes. Unused antennas are directly grounded during operation and all antennas are grounded when the ACOM amplifier and 06AT are powered off.

ACOM 06AT Additional Features and Specifications

Frequency Coverage

• Continuous Coverage from 1.8 to 30 MHz and from 50 to 54 MHz

Antenna Impedance / Matching Capability

• All impedances with SWR from 1:1 to 3:1 towards 50 Ohms, any phase angle, unbalanced input and output.

• (For some frequencies and impedances, matching is possible at SWR above 3:1 at the antenna output (up to 10:1), but the maximum allowed power is reduced.)

Maximum Allowed Input Power

- PEP, Mean or Continuous Carrier, Without Mode Limitations

• Antenna SWR below 2.5: 1500 W

• Antenna SWR between 2.5 and 3: 1200 W

• Antenna SWR between 3 and 5 (provided matching is possible): 500 W

• Antenna SWR between 5 and 10 (provided matching is possible): 200 W

• (Operation with SWR above 10:1 is not allowed.)

RF Input Characteristics

• Rated impedance: 50 Ohms unbalanced

• Input connector type: UHF SO-239 Female

• Number of RF outputs: 4

• SWR during full tuning (basic cycle): No higher than 2:1

• SWR immediately after full tuning: No higher than 1.5:1 (1.3:1 typically)

Fast Tuning Duration: Less than 50ms (from nonvolatile memory)

Full Tuning Duration (basic matching cycle)

• Below 10 MHz: less than 5 seconds (2-3 seconds typical)

• Above 10 MHz: less than 3 seconds (1-2 seconds typical)

Input Signal Necessary for Tuning Settings: 25W +3/-3 dB (12.5 to 50 W), non-modulated

Power Supply and Control

• Available only from ACOM solid-state amplifiers via the RF output coaxial cable

• +26 VDC, +10/-15% (consumption of 25 W at most)

• Control data using an FSK modem at 60 kHz

Product Dimensions and Weight

• 8.35 x 12.28 x 6.22 in. (212 x 312 x 158 mm WxDxH)

• 8.378 lbs. (3.8 kg)

Shipping Dimensions and Weight

• Approximately 15.03 x 18.07 x 13.70 in. (382 x 459 x 348 mm WxDxH)

• 13.22 lbs. (6.0 kg)

Operating Environment

• Temperature range: 14 °F to 104 °F (-10 to +40 °C)

• Relative air humidity: Up to 95% @ 95 °F (+35 °C)

• Height above sea level: Up to 10,000 ft. (3050 M) without output deterioration

*NOTICE: The ACOM 2020S is a fully functional, stand-alone Solid State linear amplifier. As of early 2023, the factory installed firmware in the ACOM 2020S supports operation of ACOM 04AT or 06AT Automatic Antenna Tuners. For earlier production of the 2020S to function with these tuners, all firmware updates are the responsibility of the owner, not DX Engineering or ACOM. Refer to the updated 2020S User Manual at acom-bg.com. Contact ACOM by e-mail for additional information: acom@acom-bg.com

According to ACOM, the first firmware update of early production units must be made using free ACOM “Terminal S” software, available for Windows, Mac and Linux, downloadable from acom-bg.com and uploaded using a computer equipped with an RS-232 port. ACOM “Terminal S” software communicates via the 2020S amplifier unit RS-232 port (DB9F).

ACOM 2020S compatibility with RS-232 serial to USB converter devices is unknown at this time.

Refer to the latest User’s Manual at acom-bg.com. Contact ACOM by e-mail for additional information: acom@acom-bg.com