Specifications

Installation
The DTS-4 and -4R are intended for indoor use only; they are not water resistant. If you use them
outdoors (Field Day, for example) you must protect them from rain.
Position your DTS-4 in a convenient spot on your operating desk. If you are using the DTS-4R
remote, you can position the DTS-4 switch anywhere within reach of the control cable. Connect
the input jack (center SO-239 connector marked TX) to your transceiver with a 50 ohm coaxial
jumper cable (not provided) of suitable power handling capacity.
Connect the coax from your antenna to the input connectors as desired. You can note which
antenna is on which port in pencil on the white label panels provided above each button on the
front panel. You can also connect a dummy load if you wish. LDG strongly recommends that you
use a high-quality, properly installed and grounded lightning arrestor in each antenna line.
Connect the ground post (wingnut) to ground. Ideally this will be a dedicated 6' - 8' copper
ground rod installed near the operation position, say, just outside the window or door. If this is
not possible, a cold water pipe can be used.
Radio Sense is an optional feature; your DTS-4 will work fine without connecting the sense port
to your rig. However, if you don't use it you'll be missing out on one of the unit's main
advantages. Connect the Radio Sense port on the DTS-4 to any source of DC on your transceiver,
transmitter or receiver that is switched on and off with main power. This is often on a DIN
connector on the back of the radio. The DC port must provide at least 2 volts DC at 1 ma, but not
more than 20 volts DC. If you are using the DTS-4R remote, connect the radio sense cable to the
remote, not the DTS-4 switch.
If you are using the DTS-4R remote, connect the provided control cable to the Control ports of
the DTS-4 and DTS-4R. The cable has standard 1/8” inch stereo plugs on each end. You can
custom make your own with parts from Radio Shack if you need a specific length.
Your DTS-4 requires 12 volts DC at 500 ma. Connect a suitable power supply to the 2.5 x 5.5
mm
coaxial DC input jack using the provided 2.5 x 5.5 mm jack coaxial power connector (center
positive). The DTS-4R remote also requires 12 volts at 100ma; you can use the same power
supply as the DTS-4 if you wish, providing it can source the total required current.
An important word about power levels
Your DTS-4 is rated up to 1,500 watts of RF power (1000 watts on 6 meters). However, some
amateur amplifiers generate signals at even higher power levels. Power levels greater than 1,500
watts will definitely damage or destroy your DTS-4. If the DTS-4 fails under overload it could
damage your transmitter. Always observe the specified power limitation
.
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