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DU 3000 Antenna Tuner
Installation
Select a location for the DU 3000 that allows the connectors to be free of any
possible contact during operation.
WARNING: Some balanced or end fed antennas will produce high RF
voltages at the feedthrough connectors. Severe RF burns may result
while in transmission if these connectors get in contact with the skin.
1. Connect a coaxial cable from your transmitter or receiver to the RF INPUT
connector on the rear panel. Keep the cable as short as possible. If you use a
linear amplifier, connect the linear amplifier output to the DU 3000 input
connector
2. Connect coaxial cables from your antenna to COAX 1 or COAX 2 connectors
on the rear panel. These connectors are either direct from the transmitter or
trough the tuned circuit depending on the setting of the OUTPUT SELECTOR
switch on the front panel.
3. If you are using a balanced feed antenna, connect the INSTALL JUMPER in
the COAX 1 connector and switch band switch TUNED COAX 1.
4. If using a single wire antenna, connect it to post COAX 1 without installing the
jumper.
5. Connect a dummy load to the BYPASS CONNECTOR using a coax cable.
This lets you select the dummy load from the OUTPUT SELECTOR switch.
Any antenna that does not require the use of the antenna tuner may be
connected to the BYPASS connector, if desired.
Before Operation
1. To avoid possible damage to the DU 3000, set INPUT, OUTPUT, BAND
SWITCH and POWER RANGE switches as outlined in the next section before
applying transmitter power (see Tuning Section).
2. Begin tuning with your transmitter set to a low power setting (50 W is more
than enough)
WARNING: Do not operate the DU3000 with the cover removed!
