ACOM 06AT is an automatic antenna tuner for HF + 6 m with integrated four-way antenna switch. The tuner automatically selects one of four available antenna outputs and matches the impedance of the chosen antenna output by transforming it to 50 Ohm with SWR below 1.5:1, providing an optimum load impedance for the amplifier.
The ACOM 06AT tuner is specifically designed and developed to work exclusively with the ACOM series of solid state (transistor) amplifiers, e.g., ACOM 500S, 600S, 700S, 1200S or ACOM 2020S.
For a CAT transceiver a single press of the TUNE button on the amplifier front panel is all you need.
After setting up the user presets (auto tune) for the frequency segments and antennas, the operator will not be involved with tuner operation.
The operator can choose according to the nature of each of the four antennas: Narrow band - Sharp, Normal - Regular, and Broadband - Wide.
Non-volatile memory for user presets (auto tune), independent for the four antennas, the three types of segment width, and more than 1000 random fixed frequencies for each antenna.
The user presets are automatically loaded, following frequency and antenna selection changes. Backup of preset memory to a computer file, import of previously made backup files from a computer to the tuner memory.
Power supply and control to the tuner, as well as status return from the tuner are facilitated over the coaxial cable between the amplifier and tuner, no need for additional cables or special control signals from the transceiver (the availability of CAT control from the transceiver will give further advantages to the setup).
Full tuning can be completed within 5 seconds (typically 2-3 seconds), at 25 W at the tuner input and less than 6 W at the antenna output; quick tuning (from nonvolatile-memory presets) is completed in less than 0.05 seconds with zero emitted signals.
The remote control and indication from an amplifier of the ACOM transistor series is provided over the input RF coaxial cable of the tuner using a 60 kHz / 4800 bps bidirectional FSK modem
Relay switching will only take place when no RF current is flowing, preventing contact arcing critical for preventing contact oxidation, surface melting and material transfer (otherwise resulting in poor receiving performance) and to avoid any unwanted widening of the spectrum of signals, emitted during the tuning cycle.
Air-core coils (no magnetic materials) and high-quality NP0 (C0G) ceramic capacitors usage throughout the matching circuit. Improves harmonic suppression - the matching network is a low-pass L filter.
ACOM 06AT can be located up to 100 m (330 ft) away from the shack (in another room, but not outdoor).
Various protection mechanisms, including antenna overvoltage, antenna overcurrent, excessive power during operation and tuning, extreme temperatures and power supply voltages, as well as relay hot-switching.
Integrated lightning arrestor and bleeder resistor for protection against static discharges automatic grounding of antennas on powering down.
Specificaton
- Continuous from 1.8 to 30 and from 50 to 54 MHz
- All impedances with SWR from 1:1 to 3:1 towards 50 Ohm, 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
- At antenna SWR below 2.5: 1500 W
- At antenna SWR between 2.5 and 3: 1200 W
- At antenna SWR between 3 and 5 (provided matching is possible) 500 W
- At antenna SWR between 5 and 10 (provided matching is possible) 200 W
- Operation with SWR above 10:1 is not allowed
- Rated impedance: 50 Ohm unbalanced
- Input connector type: UHF/PTFE (SO-239A) - 1 pc.
- 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)
- Maximum antenna output SWR: 3:1 (up to 10:1 with RF power limitations)
- Output connectors type: UHF/PTFE (SO-239A) - 4 pcs
- In the range of 1.8 to 10 MHz: No more than 5 seconds (2-3 seconds typically)
- In the range of 10 to 54 MHz: No more than 3 seconds (1-2 seconds typically)
- Non-modulated carrier power 25 W +3/-3 dB (12.5 to 50 W)
- Power Supply: +26 VDC, +10/-15%, consumption of 25 W at most
- Supplied by an amplifier of the ACOM transistor series over the input RF coaxial cable
- Max.cable length: 100 m
- Dimension: W-212 x D-312 x H-158 mm
- Weight: 3.8 kg
- Temperature range: -10 to +40 degrees Celsius
- Relative air humidity: Up to 95% @ +35 degrees Celsius
- Height above sea level: up to 3050 m (10000 ft) without output deterioration.
