LDG AT-600Pro, Operation Manual

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PAGE 7
Installation
The AT-600Pro is intended for indoor use only; it is not water-resistant. If you use it
outdoors, (Hilltopping expedition, for example) you must protect it from rain. The AT-600Pro is
designed for use with coax-fed antennas. If use with longwires or ladder-line-fed antennas is
desired, an external balun rated to 600 watts is required.
Place the AT-600Pro in a convenient location near the transceiver and amplifier. Always turn
your radio and amplifier off before plugging or unplugging anything. The radio may be damaged
if cables are connected or disconnected while the power is on.
Connect the HF antenna jack on the amplifier to the TX jack on the back of the AT-600Pro,
using a 50 ohm coax cable rated 600 watts or higher.
Connect a 50-ohm antenna feedline coax to the ANT 1 jack on the back of the AT-600Pro,
and optionally connect a second antenna feedline to the ANT 2 jack.
The AT-600Pro is designed to interface directly with many popular ICOM and Yaesu
transceivers, enabling one button tuning. In the case of ICOM radios, the optional interface cable
also powers the tuner.
For ICOM radios supporting the AH-3 or AH-4 external tuner, connect the 4-pin Molex
connector of the optional ICOM interface cable to the radio’s Tuner port. Then connect the 1/8”
stereo plug on the other end of the ICOM interface cable to the jack marked
Radio on the rear of
the AT-600Pro. Connect the coaxial DC power plug of the ICOM interface cable to the 12 VDC
Power jack.
For Yaesu FT-857 and FT-897, use the optional Y-ACC cable and plug the red end marked
Radio into the transceiver’s ACC port. Plug the black end of the Y-ACC cable into the jack
marked
Radio
on the rear of the AT-600Pro.
Unless the AT-600Pro is being powered by the ICOM radio interface cable as above, you’ll
also need to plug in the supplied DC coaxial power cable. This cable has a 2.5x5.5mm coaxial
plug on the end. Plug the coaxial plug into the
12 VDC Power jack on the rear of the AT-
600Pro, and connect the other end to a DC power source between 11 and 16 volts DC, capable of
supplying up to 500 mA.
Grounding the AT-600Pro tuner will enhance its performance and safety. LDG recommends
that you connect your tuner to a suitable ground. A common ground rod connected to buried
radials is ideal, but a single ground rod can provide a serviceable ground. LDG strongly
recommends the use of a properly installed, high quality lightning arrestor on all antenna cables.