BAL-75 and BAL-100 W2FMI HIGH POWER BALUNS



1.5:1 Balun - 75 ohms balanced to 50 ohms unbalanced (coaxial)
    For 1/2 wave dipole at 0.22 wavelengths above ground
    *5.5" x 3.8" x 2.3" (*6.8" including flanges)
When a half-wave diapole is at a height of about 0.22 wavelengths above ground, its resonat input impedance is close to 75 ohms. A 1.5:1 balun then performs the perfect match to 50-ohm coaxial cable. Although a VSWR of 1.5:1 (without the balun) is not of breat importance, some personal satisfaction can be realized by using this balun.

Model BAL-75

To Place Order on-line, please click here


2:1 Balun - 100 ohms balanced to 50 ohms unbalanced (coaxial)
    For 1/2 wave dipole at 0.22 and 0.33 wavelengths above ground
    For Quad Loop antennas which have resonance input impediance close to 100 ohms
    *5.5" x 3.8" x 2.3" (*6.8" including flanges)
Probably the most useful application of a 2:1 balun is in matching 50-ohm coaxial cable to the input of quad loop antennas. These broadband antennas generally have input impedances close to 100 ohms. When the half-wave diapole is at about 0.33 wavelengths above ground, its resonant input impedance is close to 100 ohms. This would create a VSWR of 2:1. Obviously, a 2:1 balun is needed here.

Model BAL-100

To Place Order on-line, please click here
 
  
  

353 West Grove Avenue, Orange, CA 92865, U.S.A
800-679-3184
e-mail: sales@cwsbytemark.com

© 1996 - 2002 CWS ByteMark
All Rights Reserved


CWS ByteMark is no longer affiliated with or its associates.

Return to last URL ByteMark Top Page Experimenter / Design Assortments Books - Valuable information Powdered Iron Components and information - Section I Ferrite Components and information - Section II Section III Section IV Power Magnetics W2FMI BALUNs, UNUNs & Kits - Section VI Price List Order Form / Link to Secure Site Suggested Reading W2FMI High Power UNUNs Construction Help - Connecting and Tapping Wire