BIG SIGNAL Balun 1:1
1:1 Current Balun for 50-Ohm Balanced Antennas
The BIG SIGNAL Balun 1:1 is a high-performance current balun designed to provide the proper transition between a 50-ohm unbalanced coaxial feed line and a balanced antenna or driven element with an impedance close to 50 Ohms.
Its primary function is to promote a balanced current distribution between both sides of the driven element while presenting a high impedance to common-mode currents that may otherwise flow along the outside of the coaxial cable shield.
Type: current balun
Ratio: 1:1
Application: balanced antennas with impedance close to 50 Ohms
Input: unbalanced coaxial feed line
Output: balanced antenna element
Primary function: balance driven-element currents and suppress common-mode currents
Typical applications: dipoles / Yagis / loops / directional antennas and other balanced antenna systems
Why Use a 1:1 Current Balun?
• Balances current in the driven element
Helps maintain symmetrical current distribution between both sides of a balanced antenna, allowing the antenna system to operate more closely to its intended design.
• Reduces common-mode currents
Presents a high impedance to unwanted currents that may flow along the outside surface of the coaxial cable shield, helping decouple the feed line from the antenna.
• Helps preserve the radiation pattern
By reducing unwanted participation of the coaxial feed line in the radiating system, it can help minimize asymmetry and distortion of the antenna's radiation pattern.
• Improves feed-line isolation
Helps prevent the outside of the coaxial cable from becoming an unintended part of the antenna, providing a more controlled transition between the unbalanced feed line and the balanced antenna element.
• Can reduce unwanted RF in the shack
Reducing common-mode currents can help minimize RF conducted back toward the radio shack along the outside of the coaxial feed line, as well as certain RFI and equipment-coupling issues.
• 1:1 ratio with no impedance transformation
The balun maintains a 1:1 impedance ratio, making it especially suitable for balanced antennas with a feed-point impedance close to 50 Ohms.
A More Balanced Feed for Your Antenna
The BIG SIGNAL Balun 1:1 is especially well suited for feeding balanced antennas from a 50-ohm coaxial line, helping maintain symmetrical current distribution while limiting unwanted common-mode currents on the coaxial feed line.
• Dipoles with feed-point impedance close to 50 Ohms.
• Yagi antennas with balanced driven elements.
• Loops and loop antennas with compatible feed-point impedance.
• Directional antennas with balanced feed systems.
• Installations where common-mode current suppression is required.
• Stations requiring improved isolation between the antenna and coaxial feed line.
Balanced Currents. Less Common Mode. Better Control of Your Antenna System.
The BIG SIGNAL Balun 1:1 provides a controlled transition between unbalanced coaxial feed lines and balanced antennas with an impedance close to 50 Ohms, helping balance driven-element currents, reduce common-mode currents, and maintain the antenna's intended performance.
Technical Specifications
Frequency range: 1 – 52 MHz
Impedance: 50 Ohms / 50 Ohms
Transformation ratio: 1:1
Insertion loss: < 0.1 dB
Maximum power: 2,000 W PEP
Type: 1:1 current balun
Function: balanced-to-unbalanced transition and common-mode current suppression
1 – 52 MHz • 2,000 W PEP • < 0.1 dB
The BIG SIGNAL Balun 1:1 provides coverage from 1 to 52 MHz, a 1:1 (50 / 50 Ohm) transformation ratio, insertion loss below 0.1 dB, and power handling up to 2,000 W PEP.
Construction and Materials
• Copper winding with PTFE insulation
The winding is made from high-quality copper protected by heavy-duty PTFE tubing, selected to provide stable RF performance and handle the specified power levels.
• Ni-Zn toroidal core
A low-initial-permeability nickel-zinc (Ni-Zn) ferrite toroid is used as the balun's primary magnetic component to provide the required behavior against common-mode currents.
• Stainless steel hardware
Fastening hardware is made from stainless steel, providing mechanical strength, corrosion resistance, and long-term durability.
• SO-239 connector with PTFE insulation
Equipped with an SO-239 connector featuring PTFE insulation, suitable for RF applications and high power levels.
1:1 Ratio. Wide Frequency Coverage. Minimal Insertion Loss.
The BIG SIGNAL Balun 1:1 combines a 1 to 52 MHz operating range, insertion loss below 0.1 dB, and power handling up to 2,000 W PEP, using a PTFE-protected copper winding, Ni-Zn ferrite core, and SO-239 connector with PTFE insulation.
The purchase of the products is always made on request. We manufacture all products, so manufacturing times can be added. That is why the final price of the purchase, as the final price of the shipping costs will be confirmed in an email sent afterwards.
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