Hum Eliminators

Calrad's 4new 40-970 series line of hum eliminators, also referred to as a hum bucker or a ground loop eliminator, is designed to remove interference created by long cable runs, 60 cycle power demands, grounding noise, and magnetic coupling. Normal voltage differences between system grounding points cause small AC power currents to flow through video cables. At power frequencies, a voltage drop of only 7mV peak can cause a visible hum bar. Ground loop current flows through the shield of coaxial video cable which produces a magnetic field in the core of the hum eliminator to create an inductor, or choke. The high impedance of this choke in the ground path effectively removes the hum from the signal cable at the output port of the unit.

The major advantage using a hum eliminator over an isolation transformer is high bandwidth. The low-frequency response extends to DC avoiding an effect, seen on waveform analyzers, called field-rate tilt and a high-frequency response of 100 MHz or more make these units suitable for high-definition and projection TV systems. These units are passive devices which remove induced hum while being transparent to the video signal.

Single channel units are designed for composite signals, multi-channel units can be used either for multiple composite signals, component,  RGB or Y R-Y B-Y plus sync signals. Other models are also available with internal audio ground loop isolators to remove both audio and video interference.

Our use of quality materials in the manufacture of these products will assure you that you are getting the best hum eliminator possible. New Bi-directional Digital cable hum removal filters available soon, check Calrad's website soon for further details.

Don't hesitate to call or fax us if your situation requires a custom solution.

40-970 HDTV Component Video Hum Eliminator passes 1080P, 1080I, 720P, 480P. 75ohm Impedance, 0-200Mhz bandwidth, size 8.7" x 4.1" x 2.1" Red, Green, Blue colored input \ output RCA jacks.

40-973 Composite Video \ Analog L+R Hum Eliminator. 75ohm Impedance, Video 0-200Mhz bandwidth, 10K Impedance, Audio bandwith 200-15Khz, size 8.7" x 4.1" x 2.1" Red, Green, Blue colored input \ output RCA jacks.

40-975 Single channel SDI Dgital Video Hum Eliminator. 75ohm Impedance, Data rate 1.5Gb/sec, size 4.68" x 3.68 " x 2.0" BNC input \ output jacks.

40-977 4 Channel SDI Dgital Video Hum Eliminator. 75ohm Impedance, Data rate 1.5Gb/sec, size 7.40 " x 4.70 " x 3.20 " BNC input \ output jacks.

xLobby official Product launch at Cedia 2007 in Denver Colorado. Visit us at Booth 359 for full demonstration of the xLobby software platform. Steven Hanna, Wes Black, Mike Karten will be available to demonstrate products and answer all your system integration needs. Some highlights of the demonstration of xLobby will include.

1. Server Client, multi zone Audio Video

2. HVAC, Lighting, sprinklers, Security

3. Movie, Music, Video, Picture storage

4. xLobby's customizable and skinable interface

5. System Integrators tools and support

6. Touch screen, IR, Mouse & Keyboard controllability

7. Multi screen video support

8. Multi Chassis models, shelf style or rack mount cases

9. IP based control products

10. xLobby Russound multi zone audio control interface

11. Insteon Lighting control interface

12. Global Cache, Aurora Multimedia WACI Support

Matrix Switchers

The new Calrad Matrix Switchers have Discrete IR commands and RS232, IP based controllability. Several new models will be available in June, 2007.

HDMI Feed-Thru Jacks

New improved 28-166, 28-167 low profile HDMI Panel mount feed-thru jacks with red signal L.E.D, supports all resolutions from 480P - 1080P 1.3 compliant. The connectors profile has been reduced by more than 25 %. The new individual connector design also mounts in a DB9 panel cutout, part No. 28-166LPB, no L.E.D .

New Calrad Catalog No. 61 Underway

We are in the process of creating Calrad's next exciting catalog with more problem solving items and accessories. All of our current monthly product brochures and individual product releases will be added. Look for more innovative new items and product illustrations + more pages of product's displayed in color, stay tuned for future details.

Thanks for your continued support !

Team Calrad