Do you recognize yourself in the following scenarios?
“Installed a new antenna on the tower. After some time began experiencing a bad and unstable VSWR. I suspected a defective antenna. After investigation, my balun showed to have caught water, being the reason of the problem”.
Not with an ON7FU balun. ON7FU baluns are fully waterproofed and all-weather resistant.. They are IP68 potted or provided with vent holes.
“Bought a linear amplifier capable of supplying 1000 Watts. My antenna and my commercial balun are rated 2000 Watts. After some time, my amplifier switched into protection . Investigation showed, my VSWR had become high. I had to take down my antenna. The windings of my balun appeared to have arced and were burned”.
Not with an ON7FU balun. ON7FU baluns are rated very conservatively and are constructed using Teflon type wiring, that does not burn or melt. They are also treated with a synthetic resin, especially intended for RF applications, and rated 250 kV/cm.
“Wanted to experiment with antennas. Therefore I had to loosen the connections of my balun several times. During unscrewing of the nuts, the internal connections released. Could not retighten them in a secure matter and now I am frightened about potential bad contacts”.
Not with an ON7FU balun. All terminals are firmly embedded in the hardened potting material and do not loosen during manipulation of the external connections.
“Due to my antenna dangling in the wind, something has loosened inside my balun. I hear a clattering sound inside the housing. My VSWR gets high intermittently”.
Not with an ON7FU balun. All parts are stabilized because they’re embedded in the hardened resin.
“I have installed a new antenna. As recommended, I installed a balun. Nevertheless I am suffering from RF Interference”.
Not with an ON7FU balun. ON7FU baluns uniquely work according the current forcing current balun principle, and assure the minimization of RF currents flowing on the outside of the coaxial cable shield preventing it from radiation. Furthermore they ensure an optimal antenna radiation pattern.
“I was told an antenna radiates equally well without deploying a balun. In order to save some money, I omitted it. Now I’m experiencing an RF “hot” transceiver chassis, and I burn myself when touching my tabletop microphone’s metal parts”.
This won’t happen provided you install an ON7FU current balun.
“My shack is installed at the first floor, and I fail to adequately RF earth my radio equipment. According to good engineering practice, I installed a current balun, but I still experience RF interference and RF feedback” .
An additional Line Isolator at the tower base or at the cable entrance will solve the issue. Combined with RF earthing of the coaxial cable outer shield this forms a highly efficient second order filter for common-mode currents.
“I’m experiencing high receive signal noise levels”.
The Common-Mode Choke impedance of ON7FU current baluns and Line Isolators is high enough to considerably suppress conducted noise from returning to the antenna over the outer shield of the transmission line, and entering the receive signal path.
