The LDG AT-100ProII is a general purpose automatic tuner suitable for many amateur applications. It covers 1.8-54 MHz, and features a two-position antenna switch allowing instant switching between two antennas. The AT-100ProII requires just 1 watt for operation but will handle up to 125 watts, making it suitable for everything from QRP to a typical 100 watt transceiver.
Like most LDG tuners the AT-100ProII operates automatically, beginning a tuning cycle whenever the SWR exceeds a preset limit. The AT-100ProII also features LDG’s advanced memory tuning, providing 2,000 memory locations; when tuning near a previously used frequency it will recall the settings for nearly instant tuning. It learns your favorite frequencies and bands as you use it. You can also start a tuning cycle manually whenever necessary.
Large, easy-to-read LED bargraphs show forward and reverse power in peak or average mode, and SWR. Two power scales are provided: 12.5 watts and 125 watts. The bargraphs also indicate tuner status and input confirmations.
The AT-100ProII uses LDG’s state-of-the-art, processor-controlled Switched-L tuning network. It will match dipoles, verticals, inverted-Vees or virtually any coax-fed antenna. With an optional LDG balun, you can also use longwires or antennas fed with ladder-line. It handles 100 watts SSB or 50 watts FM/Digital when used with a solid-state transceiver; vacuum tube transmitters cut the power ratings about in half.
The AT-100ProII uses latching relays which retain the tuned configuration indefinitely even when the unit is powered down. The latching relays also enable extremely low power consumption; when not actively tuning the AT-100ProII draws next to no power at all. This makes it suitable for portable or mobile operation from batteries.
All LDG tuners come with a two year fully transferable warranty and LDG’s legendary customer service.
SPECIFICATIONS:
- Transmit Power Limits: SSB: 1.0 to 125 watts; CW: 100 watts; FT-8: 75 watts; PSK and Other Digital Modes: 50 watts; 6 meters: 50 watts.
- Latching relays for ultra-low power operation.
- 4,000 memories for instantaneous band changing.
- Built-in 2-port antenna switch, with 2,000 memories each.
- Tuning time 0.2 to 5 seconds full tune, 0.2 seconds memory tune.
- 1.8 to 54.0 MHz coverage. Built-in frequency sensor.
- Tunes 6-to-1,000-ohm loads (16 to 150 on 6m).
- LED bargraph displays power level, SWR, and status.
- Antenna Indicator LED show the currently selected antenna.
- Bypass Indicator LED shows when the tuner is in pass-thru mode.
- User-selectable operating parameters: Auto/Semi, 125W/12.5W scale, and more.
- DC power cable included.
- Optional external Baluns allow tuning of random length, long wire or ladder line fed antennas.
- Optional interface cables are available.
- Power requirements: 11 to 16 VDC @ 500mA. 7mA when idle.
- Dimensions: 7.5” x 5.5” x 2.25”.
- Weight 1 pound, 5 ounces.
