Introduction; Tuner Safety Warning; Important Antenna Safety Warning - LDG AT-1000 Pro Operation Manual

INTRODUCTION

LDG pioneered the automatic, wide-range switched-L tuner in 1995. From its laboratories in
St. Leonard, Maryland, LDG continues to define the state of the art in this field with innovative
automatic tuners and related products for every amateur need.
Congratulations on selecting the AT-1000 Pro 1000-watt automatic tuner. The AT-1000 Pro
provides semi-automatic and fully automatic antenna tuning across the entire HF spectrum plus 6
meters, at power levels up to 1000 watts (SSB). It will tune dipoles, verticals, Yagis, or virtually
any coax-fed antenna. It will match an amazing range of antennas and impedances, far greater
than some other tuners you may have considered, including the built-in tuners on many radios.
The AT-1000 Pro is an upgrade from LDG's previous AT-1000 kilowatt tuner, in that it now
supports fully automatic tuning (Just talk and it tunes!) with frequency-based memories for high
power amplifier applications.
The AT-1000 Pro internally switches a very large amount of radio frequency energy.
Tremendous RF currents flow through the tuner, and sometimes very high RF voltages are
present during operation. The AT-1000 Pro is designed to handle this RF energy safely within its
specifications, with a reasonable margin of safety.
However, be warned that some amateur amplifiers are capable of transmitting RF energy in
excess of the AT-1000 Pro's maximum specifications. Some are capable of levels far in excess
of these specified maximum levels.
Operation under conditions exceeding the maximum specified ratings of the AT-1000 Pro
will cause damage to or destroy the AT-1000 Pro. Operation in significant excess of the
maximum specified power levels can actually cause explosion of internal components. For this
reason, and because of the lethal RF voltages present during normal operation, never operate
the AT-1000 Pro with the cover removed.
Never install antennas or transmission lines over or near power lines. You can be
seriously injured or killed if any part of the antenna, support or transmission line touches
a power line. Always follow this antenna safety rule: the distance to the nearest power
line should be at least twice the length of the longest antenna, transmission line or
support dimension.

TUNER SAFETY WARNING

IMPORTANT ANTENNA SAFETY WARNING

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