Quality products for industrial networking, computing, and automation

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Leaky Feeder System
VHF - UHF - EXia

Leaky feeder radio communications have become the most reliable and efficient means for communicating within mines and tunnels. As a transparent form of communication, from radio to radio, telephone to radio, data modern equipment to PC, the Sigma Communication Systems range of leaky feeder systems offers fully flexible options to suit your particularity operation.


  • Active Radiating Antenna Network
  • Ultra Low Noise System
  • Line Length Compensation
  • System Easily Expanded
  • Local and Remote Diagnostics
  • Multi Channel Voice and Data Facility
  • High Gran Amplifiers
  • Automatic Gain Control
  • Battery Backup
  • Data Transfer (Analog and Digital)
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VHF Line Amplifier

SCS1000 Series VHF SMARTTune Automatic Line Length Compensation In-Line Amplifier. The VSTLAD SMARTTune is a quantum step forward in amplifier design, offering a very SMART attenuator, which means that you can install SMARTTune amplifiers anywhere in the leaky feeder cable and the amplifier will set its gain according to the level of the input signal received from the previous amplifier.

As all amplifiers include AGC in the common path, the level of the output signal in the Base TX direction will be constant. This constant output of power is used by the next amplifier in the system as a measure of the gain required. If the cable is longer, then more gain will be applied, etc. Voice and Data capable and packaged in an IP66 heavy-duty enclosure, the amplifier is powered from leaky feeder cable; no special tools are required to splice it into the leaky feeder cable.


  • Automatic Line Length Compensation
  • High Boise Immunity
  • IP66 Enclosure
  • Digital Diagnostics
  • Voice and Data Capable
  • 12, 24 and 48VDC Versions
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About Us

Radiosource Telecoms is a Specialist Radio Communications Company that imports and distributes Communications equipment to a large dealer network.

Contact Us

Radiosource House,
53 St Andrews Drive, Durban North,
Kwa Zulu Natal, South Africa, 4051