VH Electronics TAJFUN 1000 Instruction Manual

TAJFUN 1000

INSTRUCTION MANUAL

www.italab.sk

www.kenwood.sk

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Acknowledgment

Thank you for purchasing Power linear amplifier TAJFUN 1000 144 from VH Electronics. During its
productiom, we used the latest knowledge in the field of VHF Power amplifiers and the most
advanced technology in the management, communication and display systems. We believe that our
product will exceed your expectations and will be working properly to your satisfaction. Please take a

few moments to read this manual and get acquainted with this device.

I. GENERAL INFORMATION

I.1 Description

TAJFUN 1000 144 is a small, lightweight but robust LDMOS VHF Power Amplifier (hereafter
PA) working in amateur 2m band with output power up to 1kW.

I.2 Technical parameters

 Frequency Coverage 142 - 146 MHz Amateur band
 Operating Mode FM, SSB, CW, DIGI

 Output Power 1000W CW, 800W SSB ( lineary ), 700W FM and DIGI
 Input Power 8 - 9W ( Inside 3dB hybrid attenuator )
 Power Gain Typically 20dB
 LDMOS MRFE6VP61K25H ( 1250W ) Freescale

PUSH PULL Configuration

 Class Operating AB
 Input / Output Impedance 50 Ω Connector 2 x N-female
 Suppression of harmonics ≤70 dBc (Low Pass Filter)
 Intermodulation distortion -32 dBc
 Cooling 2 axial fans PA + 1 fan Power Supply

 Power Supply Inside Input: 85 - 300VAC, 45 - 66Hz

Output: 48VDC / 1800W

 Working temperature 0 - 45°C, Max. Humidity 90%
 Dimension 266 x 105 x 294mm ( width x height x depth )
 Weight 5,5kg
 Coaxial Relay CX600NC – CX140D

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I.3 Protection, measurements and display

 Protection PWR, REF, Temperature, Imax, Umax/Umin
 Control / Display Colour TFT display

 Measurements and display:

o Drain Current
o DC Voltage
o Output Power PWR
o Reflected Power REF
o Peak Power PEP
o Temperature

I.4 Put into operation

If your device was transported or stored in a cool or cold environment, it is necessary to unzip it
first and let it dry in a warm enviroment (by doing this you will protect your device against a
possible water condensation). Then you should connect the connecting coaxial cable to the RF
INPUT and RF OUTPUT jacks on the rear panel (N-female connector) and attach the PTT RCA
(CINCH) connector. Broadcasting (Tx) is active when connected to GND.

Back panel