16:1 Baluns/Ununs

Impedance/Isolation Transformer, 3-30 MHz, 5W PEP, 1:1-16:1, SO239, N, BNC, SMA

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Product Details

For impedance transformation/isolation applications when max power is 5 Watts PEP, this transformer provides a simple interface between transmission lines with different connectors or impedances or simply common mode isolation. DC continuity for bias-T applications.


- Cast Aluminum die-cast enclosure for excellent shielding and ground continuity between receiver and coaxial shield

- Wide frequency range of 3-30 MHz with SWR under 2:1 across the entire range

- Typical input impedance from 45-55 ohms, Output impedance 50-800 ohms depending on ratio selected

- Small compact size - length (tip to tip of N connectors) = 3.625", Width = 1.5", Height = 1.2"

- Low insertion loss

Power rating: 1.5 Watts (31.8dBm) 100% duty cycle, 3.0 watts (34.8 dBm) 50% duty cycle (CW), 5 watts (37 dBm) 30% duty cycle (SSB/PEP)

Impedance ratios available from 1:1, 2;1, 4;1, 6:1, 9:1, 12;1, 16:1

Connectors: SO-239, N, BNC, SMA

Picture shows 50 ohm input, 800 ohm output with N connectors

Receiver Only Unun transformers are made to order with manufacturing time of 5 or more days before shipment depending upon quantity.

Contact company for specific needs

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16:1 Baluns are useful between 750-850 ohm balanced loads where the impedance at the  end of the feed line is 800 ohms (1/2 wavelength feed line), or high impedance feeds for rhombic,  T2FD and traveling wave antennas.

16:1 Ununs are useful between coax and long wires with a load impedance near 800 ohms like a beverage antenna.  Shortwave listener antennas also can benefit with the 16:1 unun and it may provide a better match than 9:1 ununs – this means quieter noise levels and stronger signals so you can hear distance stations easier.