A compact desktop antenna tuner, the LDG Electronics AT-100PROII Antenna Tuner, promises automatic matching across HF bands. That reassurance helps when setting up for field days or keeping a busy shack on-air with minimal fuss. Does the low control-power requirement and 125-watt handling suit your amateur set-up?
⚡ At a Glance
- • Tuning Range: Covers 1.8–54 MHz with automatic matching across HF bands
- • Best for: Amateur radio operators and home-shack users wanting quick band changes
- • Not ideal for: High-power contest stations that exceed 125 watts continuous operation
Desktop automatic tuning covers 1.8–54 MHz and matches antennas automatically. Operation requires just 1 watt while handling up to 125 watts.
Faster station readiness – with automatic tuning across 1.8–54 MHz
Automatic matching uses internal tuning circuits to adjust the antenna network for the selected frequency range and achieve a usable match without manual adjustments. The tuner activates with a 1-watt control signal and works across all bands from 1.8 to 54 MHz.
Automatic matching saves time when changing bands, keeping transceivers on-air without fiddly manual tuning. That speed is especially useful for operators who swap bands frequently during contests or nets.
Instant antenna selection – with a two-position antenna switch and LED indicator
A two-position switch allows connection of two separate antennas and an LED indicates which antenna is active. An additional LED shows when the tuner is in bypass mode.
Quick switching suits setups that use a permanent and a portable antenna, enabling immediate changeover without reconnecting feedlines. Clear LEDs remove guesswork about which feed is live or bypassed.
Low-power control, robust handling – with 1 watt operation and 125-watt rating
Control circuits require only 1 watt to initiate tuning, while the matching network is rated to handle up to 125 watts of RF power. The tuner is designed as a desktop unit for bench or shack use.
Suitable for QRP and typical home-station use where a low control power requirement is important. Higher-power transmissions up to 125 watts remain supported for modest station needs.
✨ The 4 Key Reasons for LDG Electronics AT-100PROII Antenna Tuner
- Automatic matching – reduces manual retuning between bands for quicker operation
- Two-position antenna switch – swap between antennas without rewiring, saving set-up time
- Low control power – starts tuning from just 1 watt, ideal for QRP and portable use
- LED bypass and selection indicators – clear visual status for bypass and chosen antenna at a glance
📋 Technical Details at a Glance
- Category: Electronics
- Model: AT-100PROII
- Brand: LDG Electronics
- Frequency range: 1.8–54 MHz
- Power handling: 1–125 Watts
❓ Frequently Asked Questions
Q: What frequency range does the tuner cover?
A: Covers 1.8–54 MHz and will automatically match antennas across those bands.
Q: How much RF power can the unit handle?
A: Rated to handle up to 125 watts while operation requires just 1 watt to begin tuning.
Q: Can I switch between multiple antennas?
A: A two-position antenna switch allows instant switching between two antennas, with an LED showing the selected antenna and a separate LED indicating bypass status.
🏆 Our Verdict
Ideal for amateur radio operators and home-shack users who want straightforward automatic matching and easy antenna switching. Automatic tuning across 1.8–54 MHz, low 1-watt control and LED indicators simplify both portable and bench use. Given the practical feature set and desktop form factor, the tuner represents solid long-term value for many operators.
