FEATURES

The DU 1500T optimizes the performance of your antenna and transmitter or SWL receiver by providing adjustable impedance matching. The DU1500T 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.

SPECIFICATIONS

FRONT PANEL INDICATORS AND CONTROLS

Meter…………………………Cross needle Power and SWR meter.

CONTROLS

Input Tuning………………….Continuous rotation 4,5kV capacitor 330pF

Antenna 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: 200W/2kW

Warning: !! on 1.8MHz for SWR worse then

1:3 MAX 800W!!

REAR PANEL CONNECTORS

Coax 1……………………………SO-239 Teflon connector

Coax 2……………………………SO-239 Teflon connector

Balanced Line……………………Dual high voltage ceramic terminal

Include 4:1 balun

OTHER

Frequency Coverage………………1.8-30MHz ,continuously tunable

Power Maximum…………………1500W max 2kW

Input impedance………………….50 ohm

Output impedance…………………25-600ohm and wire 2000ohm

Dimension……

……………………H 4.7” (12cm) W 13” (33cm) x D 13” (33cm)

Weight…………………………….10 lbs. (4.5kg)

CONTROL/CONNECTORS

FRONT PANEL FUNCTIONS

1. Output (Transmitter) Continously adjustable input capacitor
2. POWER/SWR METER Dual needle meter displays FORWARD and REFLECTED Power in Watts. The SWR in measured where the two needles intersect on the red scale.
3. INPUT (Antenna)

Continuously adjustable output capacitor.

4. DIRECT-TUNED MODE SWITCH

Five-position rotary switch an output coaxial connector.

1.TUNED COAX 1 selects the COAX 1connector trough the impedace matching circuit.

2.TUNED COAX 2 selects the COAX 2

connector trough the impedance matching circuit.

3.DIRECT BYPASS selects BYPASS COAX connector bypassing the impedance matching circuit but provindingSWR, FORWARD, and REFLECTED power meter readings.

4.DIRECT COAX 1 select the COAX 1 connector bypassing the impedance matching circuit but providing SWR, FORWARD, and REFLECTED meter readings.

5.DIRECT COAX 2 selects the COAX 2 connector bypassing the impedance matching circuit but providing SWR, FORWARD, and REFLECTED meter readings.

6. TUNED WIRE/BAL selects the BALLINE+COAX 1 connector through the impedance matching circuit.

5.RANGE SWITCH

Two-position switch selects the range

(200W or 2kW) of FORWARD and

REFLECTED Power displayed on the power meter.

When the METER (power range) switch 200W the FORWARD meter

Scale reads 200W full scale and the REFLECTED meter scale reads 40W full scale.

When the METER switch is on 2kW, the FORWARD meter scale reads 2kW full scale and the REFLECTED meters scale reads 400W full scale.

REAR PANEL CONNECTORS

DU1500T Rear Panel

1. RF INPUT – Coaxial connector for input from SWL receiver or transmitter.

2 COAX 1 – Coaxial connector for output to Antenna One.

3. COAX 2 – Coaxial connector for output to Antenna Two.
4. BYPASS – Coaxial connector for output to dummy load or third coax output.
5. GROUND – Post/Wing-nut type ground connector.

6 BALANCED OUTPUT Two ceramic post for output to RF balanced twin-lead antennas.