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Broadband 1:1 Current Balun
$99.99
Current Baluns are sometimes referred to as Choke Baluns.
This Balun is essentially a Black Beauty Broad 160-10 Common Mode Choke connected as a Balun.
This Balun serves as an interface between balanced antennas (such as dipoles or yagis) and an unbalanced coaxial cable feedline. The 1:1 impedance ratio means that it is commonly used with antennas that present a feed point impedance in the vicinity of 50 ohms. The magnitude of Common Mode Current on the feedline is greatly reduced as the current in each leg of the antenna is "forced" to be the same.
Because the antenna is better balanced and Common Mode Current is greatly reduced, signal quality is improved and the antenna's intended radiation pattern and performance are improved.
This unit is sealed and can be mounted in any orientation. Mounting options:
* It can be mounted to a solid surface with screws, or
* hung by the top eyebolt, or
* suspended between the side eyebolts, or
* attached to a mast or boom with U-bolts using one of our Mounting Kits.
This Balun covers the entire HF spectrum from 1.8 MHz to 30 MHz. It's very low loss of <0.09 dB means there is no detectable reduction in signal strength when transmitting or receiving.
Broadband 4:1 Hybrid Balun
$109.99
This Hybrid Balun is comprised of a Ruthroff 4:1 Voltage Balun followed by a broadband Common Mode Choke (also known as a Current Balun or Choke Balun). It combines the strengths of a Voltage Balun with the strengths of a Current Balun. The best of both.
It matches a ~200 ohm antenna to a 50 ohm coaxial cable feedline AND balances both the voltage and the current in each leg of the antenna. This makes it especially desirable for use with Off Center Fed Dipoles (whether Horizontal or Vertical) which are, by their nature, unbalanced - and tough to balance. But it is also very effective with many other antennas. It increases the Common Mode Rejection Ratio (CMRR) when used with Loops, Folded Dipoles, or any other antenna with a feed point impedance around 200 ohms.
Like a Ruthroff Voltage Balun, this Hybrid Balun serves as an interface and broadband matching device for ~200 ohms antennas. However, it does a much better job of balancing the antenna (if the antenna is unbalanced) because it balances both voltage AND current in each leg of the antenna. As a result, it is superior to a simple Voltage Balun or Current Balun.
Because the antenna is better balanced, signal quality is improved and the antenna's intended radiation pattern and performance are improved.
This unit is sealed and can be mounted in any orientation.
* It can be mounted to a solid surface with screws, or
* hung by the top eyebolt, or
* suspended between the side eyebolts, or
* attached to a mast or boom with U-bolts using one of our Mounting Kits.
This Balun covers the entire HF spectrum from 1.8 MHz to 30 MHz with very low loss of <0.12 dB. It also covers up to 54 MHz with slightly increased loss. This means there is no detectable reduction in signal strength when transmitting or receiving.
Broadband 4:1 Ruthroff Voltage Balun
$99.99
Ideal for Loops, Folded Dipoles, Off Center Fed Dipoles (OCFDs), or any other antenna with a feed point impedance around 200 ohms.
This Balun serves as an interface and matching device for ~200 ohms antennas. It ensures the voltages on the two sides of a balanced antenna are equal. Its primary function is to maintain voltage balance between a balanced antenna and the unbalanced coaxial cable feedline, thereby improving signal quality and helping to preserve the intended antenna pattern and performance.
This unit is sealed and can be mounted in any orientation. A wide variety of mounting options are possible:
* It can be mounted to a solid surface with screws, or
* hung by the top eyebolt, or
* suspended between the side eyebolts.
This Balun covers the entire HF spectrum from 1.8 MHz to 30 MHz. It's very low loss is <0.03 dB. Therefore, its loss has no practical effect on transmitted or received signal levels.