Descrizione
Every HF operator eventually meets the same wall: the antenna you have is not the antenna the band wants. The Match Point exists to close that gap automatically. It is the ATU-130 MAX, an update on the widely used ATU-100, running a PIC18F2520 microcontroller and a redesigned four-core magnetic loop that generates less heat than the previous generation.
The tuner covers 1.8 to 50 MHz with a maximum working power of 200 watts, comfortably inside the 150W SSB figure the manufacturer recommends for sustained operation. Tuning starts from a minimum of 10 watts, which means a 100 watt transceiver drives it without stress, and the measurement front end resolves 0.1 watts below 10 watts and 1 watt above. Matching impedance spans roughly 5 ohms to 1.2 kilohms, which covers a long wire on a bad day as well as a resonant dipole on a good one.
The hardware is built for repeated tuning rather than one careful setup. HF32 relays rated at 10A and HF33 relays at 5A handle the switching, a 6 kilovolt ceramic capacitor takes the voltage that appears when an antenna is far from resonance, and the metal body shields the matching network from the field it lives in. Inductance steps at 0.05 microhenry up to 8.53 microhenry, and capacitance steps at 10 picofarad up to 1869 picofarad, which is a genuinely fine resolution for a tuner in this size and price bracket.
The band is fixed. The match does not have to be.
Key Features
- ✦ 1.8 to 50 MHz coverage with 200 watts maximum working power.
- ✦ PIC18F2520 microcontroller for automatic tuning without operator intervention.
- ✦ Four-core magnetic loop design that reduces heat compared with earlier tuners.
- ✦ HF32 (10A) and HF33 (5A) relays for reliable band switching.
- ✦ 6 kilovolt high voltage ceramic capacitor for off-resonance conditions.
- ✦ Tuning starts from just 10 watts of drive power.
- ✦ Matching range from about 5 ohms to 1.2 kilohms.
- ✦ Built-in battery and metal body for portable field use.
Technical Specifications
- Brand: Shunmaii
- Model: ATU-130 MAX, update of the ATU-100
- Frequency Coverage: 1.8 to 50 MHz
- Maximum Working Power: 200 watts
- Recommended Continuous Power: 150W SSB; 130W AM in the morning band conditions
- Minimum Power To Start Tuning: 10W
- Minimum Measurable Power: 0.1 watts
- Measurement Accuracy: 0.1W up to 10W, 1W above 10W
- Microcontroller: PIC18F2520
- Relay System: HF32 at 10A and HF33 at 5A
- Tuning Capacitor: 6 kilovolt high voltage ceramic
- Maximum Inductance: 8.53 microhenry, minimum step 0.05 microhenry
- Maximum Capacitance: 1869 picofarad, minimum step 10 picofarad
- Matching Impedance Range: 5 ohms to 1.2 kilohms
- Supply Voltage: 10 to 15 VDC, positive at centre
- Current Consumption: 500mA maximum, typically 200 to 300mA
- Body Material: Metal with ABS and PC components
- Built-in Battery: Yes
Where It Belongs
Portable field operations, POTA and SOTA activations, home stations with multi-band wire antennas, mobile HF installs, and emergency communications where the antenna is whatever can be erected on site. Operators who change bands often will notice the automatic tuning most, because the tuner follows the radio instead of the operator following the tuner.
Frequently Asked Questions
Q: How much power can it handle?
Maximum working power is 200 watts. For sustained operation the recommendation is to stay within 150W SSB, and 130W for AM work, which keeps the matching network inside comfortable thermal limits.
Q: Will my 100 watt radio drive it?
Yes. Tuning starts from a minimum of 10 watts, so a standard 100 watt transceiver drives the tuner comfortably across the band.
Q: What antennas does it match?
Anything inside its 5 ohm to 1.2 kilohm matching window, which covers dipoles, end-fed wires, verticals, and magnetic loops across 1.8 to 50 MHz, subject to the antenna length and standing wave conditions.
Q: Is it an improvement over the ATU-100?
It is the update version. The four-core magnetic loop reduces heat generation, the capacitor and relay specifications are documented on the listing, and the measurement resolution goes down to 0.1 watts at low power.
Q: Does it need a separate power supply?
It runs from 10 to 15 VDC with positive at centre, drawing up to 500mA and typically 200 to 300mA. A built-in battery is included for portable use.
Q: How fine is the matching resolution?
Inductance steps at 0.05 microhenry up to 8.53 microhenry, and capacitance steps at 10 picofarad up to 1869 picofarad, which is fine enough to find a match on difficult antennas.
The EastSupplier Promise
Every tuner is checked before dispatch and shipped with tracked international delivery. Because supply voltage and connector arrangements vary between stations, our team confirms your DC setup and transceiver interface before the unit leaves the warehouse.
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