Vine Antenna DU-3000T 3Kw Antenna Tuner
FEATURES
The DU 3000 optimizes the performance of your antenna and transmitter or SWL receiver. By providing adjustable impedance matching. The DU 3000 also measures the Power and Standing Wave Ratio (SWR), which allows you to tune the indicted SWR to the lowest possible ratio for the selected transmit frequency.
SPECIFICATION
FRONT PANEL INDICATORS AND CONTROLS
Meter …………………………………. Cross needle Power and SWR meter
CONTROLS
Input Tuning ………………………… Continuous rotation 4,5kV capacitor 330pF
Output Tuning ……………………… Continuous rotation 4,5kV capacitor 330pF
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 position: 3
00W/3kW
REAR PANEL CONNECTORS
Coax 1 ……………………………….. SO-239 Teflon connector
Coax 2 ……………………………….. SO-239 Tflon connector
Balanced Line ……………………… Dual high voltage ceramic terminal
Include 4:1 balun
OTHER
Frequency Coverage ……………. 1.8-30MHz ,continusoly tunable
Power Maximum ………………….. 3000W max 3kW
Input impedance ………………….. 50ohm
Output inoedance ………………… 25-600ohm an
d wire 2000ohm
Dimension …………………………… H 330xW
330xD 120
Weight ……………………………….. 5.5kg
CONTROL/CONNECTORS
FRONT PANEL FUNCTIONS (Refer to page 3)
- Output (Antenna)
Continously adjustable input capacitor
- POWER/SWR METER
Dual needle meter displays FORWARD and REFLECTED Power in Watts. The SWR in measured where the two needles intersecton the red scale.
- INPUT (Transmitter)
Continuously adjustable output capacitor.
- DIRECT-TUNED OUTPUT SELECTOR
Five-position rotary switch an output coaxial connector.
- TUNED COAX 1 selects the COAX 1connector trough the impedace matching circuit.
- TUNED COAX 2 selects the COAX 2 connector trough the impedance matchi circuit.
- DIRECT BYPASS selects BYPASS COAX connector by passing the
impedance matching circuit but provinding SWR, FORWARD and REFLECTED power meter readings.
- DIRECT COAX 1 select the COAX 1 connector bypassing the impedance matching circuit but providing SWR, FORWARD and REF
LECTED meter readings.
- DIRECT COAX 2 selects the COAX 2 connector bypassing the impedance matching circuit but providing SWR, FORWARD and REFLECTED meter readings.
- TUNED WIRE/BAL selects the BAL. LINE+COAX 2 connector through the impedance matching circuit.
- POWER RANGE SWITCH
Two-position switch selects the range (300W or 3kW) of FORWARD and REFLECTED Power displayed on the power meter.
When the METER (power range) switch 300W the FORWARD meter scale reads 300W full scale and the REFLECTED meter scale reads
40W full scale. When the METER switch 3kW, the FORWARD meter scale reads 3kW full scale and the REFLECTED meter scale reads 400W full scale.
- INDUCTOR Ceramic body
REAR PANEL CONNECTORS
- RF INPUT
Coaxial connector for input from SWL receiver or tr
ansmitter.
- COAX 1
Coaxial connector for output to Antenna One or Wire Antenna
- COAX 2 Coaxial connector for output to Antenna Two.
- BY PASS Coaxial connector for output to dummy load or third
coax output.
- GROUND
Post/Wing-nut type ground connector.
- BALANCED OUTPUT
Two feedthrough ceramic posts for output to RF balanced twin-lead antennas.
- INSTALL JUMPER – when using Balanced Output
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. RF BURNS MAY RESULT IF TOUCHED DURING TRANSMISSION.
INSTALLATION PROCEDURES
- Connect a coax 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 your transmitter to the linear amplifier output to the DU 3000.
- Connect coax cable(s) 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.
- If you are using a balanced feed antenna, connect the INSTALL JUMPER in the COAX 1 connector and switch band switch TUNED COAX 1.
- If using a single wire antenna, connect it to post COAX 1 without installing jumper.
- 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 or fan antenna tuner may be connected to the BYPASS connector, if desired.
BEFORE OPERATION
- 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.(Tuning Section)
- Begin tuning with your transmitter set to a low power setting (~50 w is more than enough)
WARNING: DO NOT OPERATE THE DU 3000 WITH THE COVER
OFF!
NOTES
- An SWR or 1:1 is best, but an SWR as high as 2:1may be acceptable. Check you transmitter manual for details.
- If you cannot get an acceptable SWR, lengthen or shorten you antenna and/or feedlines and retune.
- If you get low SWR readings at more than one setting,use the setting that:
Gives the highest FORWARD power reading.
Gives the lowest REFLECTED power reading.
Uses the largest capacitance (highest number) on the TRANSMITTER and ANTENNA controls.
- Any time a new or different antenna is connected, it is necessary to repeat the tuning procedure for each antenna.
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