CUBE 1:1 Balun, 5KW, 160-6 Meters, -38dB CMRR, FT8/RTTYProduct DetailsBrand: Palomar EngineersEffective Frequency Range (MHz): 1-61 MHzPEP Power Rating (watts): 5000Estimated Insertion Loss (db): .10Input Connector Type: SO-239 femaleOutput Connector Connector Type: top studs or side eyeboltsGround Connector (Y/N): noneEnclosure Size (LxWxH inches): 4 x 4 x 45000 Watt Rated 1:1 CUBE™ BALUN
* Suppress radiation from coax cable
* Provides maximum transfer of RF to the antenna.
* Help keep RF out of the shack.
* Heavy Duty Cycle for Legal Limit FT8/RTTY
* Reduces RFI to appliances and neighbors.
* Side Eye Bolts or Top Studs Output Option
This BALUN utilizes mil-spec coax cable for the windings on multiple ferrite beads with coax silver shield and silver braid for low loss. The dielectric is Teflon® insulation for high voltage ratings of 1,900 volts. (A typical 5KW signal at 50 ohms impedance will have a voltage of 500 volts at 1:1 SWR). Available wired as a BALUN (CB-1-5000) with wire studs output or side eye bolts for dipole antennas. Rated 5KW PEP/1500 Watts AM/RTTY/CW/FT-8 from 1.8-61 MHz. Enclosure is 4" x 4" x 2"
If you run FT8/RTTY contests at 1500 watts output, this is the balun you need – it won’t burn out at heavy 1500 watt duty cycles like other brands rated at 1500 watts (or more). We use these same chokes in our own RTTY station at full 1500 watts output and they have never failed. We use one at the amplifier output and another at each antenna feed point. Works very well on OCF antennas below the 4:1 balun to keep RF current on the antenna and off the feed line. Built like a tank, works like a charm, and priced under the competition – what more can you ask for? THIS IS OUR MOST POPULAR 1:1 BALUN!
HF 1-61 MHz coax feed line common mode chokes
5000 Watt Rated 1:1 CUBE™ BALUN
* Suppress radiation from coax cable
* Provides maximum transfer of RF to the antenna.
* Help keep RF out of the shack.
* Heavy Duty Cycle for Legal Limit FT8/RTTY
* Reduces RFI to appliances and neighbors.
* Side Eye Bolts or Top Studs Output Option
This BALUN utilizes mil-spec coax cable for the windings on multiple ferrite beads with coax silver shield and silver braid for low loss. The dielectric is Teflon® insulation for high voltage ratings of 1,900 volts. (A typical 5KW signal at 50 ohms impedance will have a voltage of 500 volts at 1:1 SWR). Available wired as a BALUN (CB-1-5000) with wire studs output or side eye bolts for dipole antennas. Rated 5KW PEP/1500 Watts AM/RTTY/CW/FT-8 from 1.8-61 MHz. Enclosure is 4" x 4" x 2"
If you run FT8/RTTY contests at 1500 watts output, this is the balun you need – it won’t burn out at heavy 1500 watt duty cycles like other brands rated at 1500 watts (or more). We use these same chokes in our own RTTY station at full 1500 watts output and they have never failed. We use one at the amplifier output and another at each antenna feed point. Works very well on OCF antennas below the 4:1 balun to keep RF current on the antenna and off the feed line. Built like a tank, works like a charm, and priced under the competition – what more can you ask for? THIS IS OUR MOST POPULAR 1:1 BALUN!
1:1 feed line Chokes (also known as feed line current chokes, common mode chokes, line isolators, current mode chokes, and 1:1 baluns/ununs) are available in kit form or assembled form in a weatherproof Current Unun and Balun Enclosure which we call a CUBE™. All 1:1 chokes are ferrite based and are designed for 50 ohm coaxial cable input and 50 ohm output. 1:1 Ferrite toroidal or bead chokes have a higher choking impedance than our popular Sleeve Chokes and various models are available for specific frequency ranges and power levels.
1:1 Chokes are useful for choking common mode currents that may flow on the exterior of the coax cable shield while allowing the signals on the interior of the shield and the center conductor to flow unaffected and keeping the common mode current on the antenna. They isolate the coax shield and prevent it from becoming part of the antenna system.
1:1 Chokes are useful between balanced lines for center fed dipoles at their fundamental frequency (468/f (MHz), beam antennas with a 50 ohm balanced driven element, G5RV, loops, yagis, NVIS antennas, mobile installations, portable antennas and anywhere common mode current (or RFI) is a problem. They are also helpful between transmitter and linear amplifier or between linear amp and antenna tuner or as isolation chokes where higher choking impedance is needed (in the range of 2K-7K ohms).
1:1 Chokes are also very useful as feed line current chokes at the “radio end” of the antenna (we call them coax noise filters) where they choke/filter common mode current induced onto the coax shield from radiated waves (from your antenna, and other sources such as DSL routers, computer devices, plasma TVs, etc. originating in your house or your neighbor’s house). For RFI issues see RFI/EMI Solutions for general use or for specific radios and devices.
For best results we recommend a 1:1 choke at the “antenna end” of the coax and a coax noise filter at the “radio end” of the coax. (A side benefit is a reduction in noise level caused by common mode currents). 1:1 chokes are also available as Sleeve Chokes (Slip on or Snap on) for ease of installation and light weight on the antenna.