Allen Avionics HEC-2000-H
Video Hum Eliminator with Handles


The Allen Avionics HEC-2000-H is designed to eliminate hum in video applications caused by long cable runs or ground loops. The HEc-2000-H features a 1/4" thick, stainless steel guard rails to protect the connectors when not in use.

The end user has a choice of connector location and protection, plus the performance of the standard HEC-2000. The HEC-2000-H is designed for optional rack mounting installation. 

The HEC series works in circumstances where interference is caused by small differences in ground potential (less than 20 volts) or by induced currents in long cable runs. When there are multiple power panels in a building, or even a single floor, equipment and lighting loads resut in small differences in potential which induce a ground loop current flow and 60 Hz hum.

Electronically-induced current flows in long cable runs also create hum. For 50 Hz and 60 Hz power systems, and where induced currents are high, the HEC-2000, HEC-2000-H and HEC-2000-V increase the attenuation at the power frequency.

Should a small amount of hum remain after an HEC has been added to the circuit, a second HEC can be added in series, without significant degradation of the video signal.


  • Field:
    • Between Remote Truck, Telco & Microwave
    • For Intertruck Hookup
    • For VTR Units
    • For Monitoring Lines
  • Studio:
    • Between Buildings
    • On Long Runs in Buildings
    • Between Studios & Transmitters
    • On Incoming & Outgoing Telco Circuits

Allen Avionics HEC-2000-H Features:

  • Flat Response
  • Bandwidths up to 30MHz
  • No Low or High Frequency Roll-Off
  • No Differential Gain or Phase Distortion
  • Rugged, Waterproof Case
  • BNC Connectors
  • Passive Device - Failure Free
  • For Color and Black & White
  • Reversible
  • Small, Compact Package

Allen Avionics HEC-2000-H Specifications:

  • Impedance: 75 Ohms, Unbalanced
  • Bandwidth: DC to 30 MHz
  • Insertion Loss:
    • 0.75 dB @ 10 MHz
    • 1.20 dB @ 20 MHz
    • 1.50 dB @ 30 MHz
  • Return Loss: 20 dB
  • Hum Reduction: 60 dB fo 50 Hz or 60 Hz systems
  • Packaging: Die Cast Metal
  • Mounting: Four (4) 6-32 x 1/2" inserts
  • Dimensions (WxD): 3 11/16" x 2 1/16"
  • Weight: 3-1/2 lbs
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