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DU 3000 Antenna Tuner
Features
The DU 3000T and DU3000TB tuners optimize the performance of your antenna and
transmitter or SWL receiver by providing adjustable impedance matching. The DU
3000 series also measure the Power and Standing Wave Ratio (SWR), which allows
you to tune the indicated SWR to the lowest possible value for the selected transmit
frequency.
Specifications
Front Panel Indicators and Controls
Meter ........................................ Crossed needles Power and SWR meter
Input Tuning .............................. Continuous rotation 4.5 kV capacitor 330 pF
Output Tuning ........................... Continuous rotation 4.5 kV capacitor 330 pF
Antenna Switch Selector........... Five position ceramic switch: COAX 1, Tuned and
COAX 2 Tuned and BYPASS, COAX 1 DIRECT,
COAX 2 DIRECT
Power Range Switch ................ Two positions: 300 W / 3 kW
Rear Panel Connectors
Coax 1 ...................................... SO-239 Teflon connector
Coax 2 ...................................... SO-239 Teflon connector
Balanced Line ........................... Dual high voltage ceramic terminals
Includes 4:1 balun
(Only the DU3000TB)
Left: Interior view of the DU3000TB. Right: Interior view of the DU3000T
Note that the DU3000TB has a toroidal dual core 4:1 balun at the right rear corner while the
DU3000T does not have it.
Other
Frequency Coverage ................ 1.8 - 30 MHz, continually tunable
Power Rating ............................ 3000 W
Input impedance ....................... 50
Ω
Output impedance .................... 25
– 600 Ω for coax and 2000 Ω for wire
Dimensions (WDH) ................... 400 mm x 380 mm x 130 mm (15-3/4" x 15" x 5-1/8")
Weight ...................................... 6.0 kg (13.2 lb)
