Mint Boxed bought in for a customer who never paid for it. Un used tested only and works a treat. Selling for £700.

Read Eham reviews  https://www.eham.net/reviews/view-product?id=10038#:~:text=This%20is%20an%20expensive%20antenna,new%2050%20years%20from%20now.&text=Time%20Owned%3A%203%20to%206,tuner%20used%2C%20from%20a%20friend.

FEATURES

 DU-1500T

The DU 1500 optimizes the performance of your antenna and transmitter or SWL receiver

By providing adjustable impedance matching.The DU 1500 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.

 DU-1500T

SPECIFICATION

FRONT PANEL INDICATORS AND CONTROLS

LAMCO DU-1500T

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

CONTROLS

 DU-1500T

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

!!1.8MHz SWR wors then 1:3 MAX 800W!!

REAR PANEL CONNECTORS

 DU-1500T

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 ,continuously tunable

Power Maximum…………………1500W max 2kW

Input impedance………………….50ohm

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

Dimension…………………………H 330xW 330xD 120

Weight…………………………….10lbs.(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 theCOAX 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 impedanc

matching circuit but provinding SWR,FORWARD,and REFLECTED power

meter readings.

4.DIRECT COAX 1 select the COAX 1 connector bypassing the impedance

matching circuit but providingSWR,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.

TUNED WIRE/BAL selects the BAL.LINE+COAX 1 connector through the

impedance matching circuit.

   RANGE SWITCH

Two-position switch selects the range (200W or 2kW) of FORWARD and

REFLECTED Power displayed ont he power meter.

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

Scale reads 200W full scaleand the REFLECTED meter scalereads 40W

Full scale.

When the METER switch 2kW,the FORWARD meter scale reads 2kW

Full scale and the REFLECTED meter scale reads 400W full scale.

REAR PANEL CONNECTORS

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 toRF balanced twin-lead antennas.

 

7. Install Jumper

INSTALLATION

Select a location for the DU 1500 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 BANANA CONNECTORS.RF

          BURNS MAY RESULT IF TOUCHED DURING TRANSMISSION.