Radiowavz B11A

The RadioWavz 1:1 B11a is designed to handle full legal power with a low standing wave radio (SWR). It has a 1 to 1 impedance ratio. The Voltage BALUN is a Tri filer Air Core BALUN, this is one of the most common BALUN designs.

The BALUN is rated to handle 1500w SSB or 200w watts power on CW. 1.8 Mhz to 30 MHz with low energy loss. Typically insertion loss is less than 0.2 dB

One of the strongest features is the fact that the BALUN utilizes an open air core. the air-core of the tri filer can't saturate like the ferrite-core and, unlike ferrite-core wire-wound baluns, single-layer wound baluns almost never have an insulation breakdown problem.

Also, a Trifilar-wound BALUN does not like to work into anything but a perfectly balanced load. With an imperfectly balanced load, the coax-balun will not, as does the trifilar balun, generate a differential, third RF-current on the outside of the coax that brings the RF to the input of the tuner.


A BALUN is a device, which allows a symmetrical antenna (e.g. dipole) to feed an asymmetrical line (e.g. coax cable) and vice versa. It is balancing an unbalanced input.

Construction notes:

The wire used in the construction of our BALUNS is a High Voltage High duty cycle, High Frequency wire. This wire is more commonly used in the fabrication of high voltage power inverters and many Mill spec BALUNS.

Many of the BALUNs on the Amateur radio market today only use basic transformer wire. This lends to High voltage stress, and dielectric breakdown with just moderate use.

These BALUNs are constructed with High tension eyehooks. The external threads, nuts and washers are treated with Pentrox, an oxide inhibiting joint compound to improve electrical conductivity and enhance the integrity of the connection.