Automatic antenna tuner for shortwave, the Malahit Automatic Antenna Tuner ATU-100 promises fast, hands-free matching across 1.8–50 MHz. Fewer fiddly adjustments mean more time on air for busy operators. Is compact metal construction and updated v3.2 firmware enough for long-term use?
⚡ At a Glance
- • Tuning Range: Covers 1.8–50 MHz, rated for up to 100 W
- • Best for: Shortwave amateur radio operators seeking quick automatic antenna matching
- • Not ideal for: Users who require battery-powered, fully portable operation
Automatic tuning uses onboard firmware v3.2 and an imported PIC controller. CNC perforated aluminium alloy housing with high-voltage SMD capacitors delivers a compact, robust assembled unit.
Reliable automatic tuning - with updated v3.2 firmware and a PIC controller
Automatic tuning runs on firmware version 3.2, reported as updated from 3.1 to fix earlier errors, and uses an imported PIC chip to control tuning sequences. High-quality SMD capacitors and C-channel components form the matching network.
Faster, more consistent antenna matching without manual capacitor adjustments, ideal for operators who change bands frequently.
Durable, compact construction - with CNC perforated aluminium alloy housing
The shell is CNC-perforated aluminium alloy, manufactured to enclose the tuner circuitry and aid heat dissipation. The assembled metal housing omits a battery compartment and focuses on a slim footprint.
Robust metal case withstands regular shack use and helps protect internal parts, making long-term installation straightforward.
Ready-to-use connectivity - with UHF connector and supplied power accessories
A UHF connector provides the RF interface, while a DC 5.5 x 2.1 power cable (0.75 mm² pure copper, 50 cm) and a USB 5V to 9V booster board are included for power. No battery is supplied, so external power is required.
Immediate setup with common transceivers and 5V USB sources, convenient for operators who prefer minimal assembly.
✨ The 4 Key Reasons for Malahit Automatic Antenna Tuner ATU-100
- Updated v3.2 firmware – Faster, more reliable tuning compared with older versions
- High-voltage SMD capacitors – Stable performance under high SWR and continuous operation
- CNC aluminium housing – Durable, compact metal case for long-term outdoor or shack use
- Included power and booster cables – Ready to run from common 5V sources with supplied cables
📋 Technical Details at a Glance
- Category: Electronics - Antenna tuner
- Frequency Range: 1.8–50 MHz
- Power Handling: 100 W
- Tuning Method: Automatic tuning, firmware v3.2
- Controller: Imported PIC chip
❓ Frequently Asked Questions
Q: Does the tuner include a battery?
A: No, a battery is not included; power is supplied via the included DC 5.5 x 2.1 cable or the supplied USB 5V to 9V booster board.
Q: Will it work with my transceiver?
A: User feedback notes compatibility with a wide range of transceivers, and a UHF connector is provided for RF connection, though no exhaustive compatibility list is supplied.
Q: Is the tuner difficult to set up?
A: The unit arrives assembled and uses automatic tuning with firmware v3.2, and user reviews describe it as very easy to use.
🏆 Our Verdict
The Malahit Automatic Antenna Tuner ATU-100 suits amateur radio operators who want fast, hands-free matching across shortwave bands. Compact CNC aluminium construction combined with high-voltage components and updated firmware makes for a dependable, ready-to-use tuner that should deliver long-term value in a shack or portable setup.
