The 4:1 W2FMI HIGH POWER BALUNS
Step Down 4:1 Balun - 12.5 ohms balanced to 50 ohms unbalanced (coaxial)
1 MHz to 50 MHz 5 KW to 10 KW *5.5" x 3.8" x 2.3" (*6.8" including flanges) |
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Model BAL-12.5 To Place Order on-line, please click here |
Step Up 4:1 Balun - 200 ohms balanced to 50 ohms unbalanced (coaxial)
For Folded Dipoles using 300 ohm ribbon at 0.17 wavelength above ground Multi-band antenna Off-center-Fed antennas 1MHz to 50 MHz 2KW to 10KW |
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| The 4:1 balun finds use in matching 50-ohm cable to log periodic beam antennas, multi-band antennas and folded dipoles using 300 ohm ribbon at a height of about 0.17 wavelength above ground. A dual ferrite core version is also available for high power and for G5RV. For antenna tuners, please use BAL-AT-200. The 4:1 BAL-U-200 is both a current and a voltage balun. The BAL-U-200 is uniquely designed to function both as balanced to unbalanced matching and unbalanced to unbalanced matching. It is particularly suited for off-center fed antennas. | |
To Place Order on-line, please click here
To Place Order on-line, please click here |
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4:1 Balun for Antenna Tuner Balun
For High Power (10KW) Log Periodic Beam Antennas For High Power (10KW) G5RV Multi-band Antennas 1MHz to 50MHz |
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| The 4:1 baluns in antenna tuners can be subjected to very hostile conditions (mainly ver high impedances and hence, high voltages) depending upon the length of the transmission lines. Therefore special attention is paid to the desigh of the balun and the best length for one-half of the dipole and the feedline. For antenna tuners, experience has shown that a balun with a rather large powdered iron toroidal core, connected as a voltage (Ruthroff's design) balun, to the be preferred choice. These 10KW baluns can also be used for high power log periodic antenna and G5RV. | |
To Place Order on-line, please
click here
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1- 800-679-3184
e-mail: sales@coilws.com
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