The simplest, most cost effective feed line choke is a ferrite ring installed as shown in the picture (at the antenna feed point) to stop feed line radiation or at the radio end of the coax to suppress common mode coax noise current on the coax braid.
Great choke for log periodics, HF beams, Transceiver/Amp isolation
Improves antenna pattern by preventing your dipole from becoming a tripole
Suppresses pesky coax braid radiation and RFI
Reduces coax braid common mode current up to -40 dB ( 6 “S” units) on receive
Use one choke for each antenna feed line
Add a double female barrel connector to act as an “extension” of the existing coax.
50:800 ohm (16:1) CUBE™ Unun 3-43 MHz - 1KW/2KW PEP
| Quantity | Price per item | Discount |
| 2 items | $119.15 | 8% off |
| 10 items | $109.35 | 16% off |
| 100 items | $99.29 | 24% off |
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. Output is eyebolt/output on top, ground/counterpoise on side.
Choose 1KW/2KW PEP power option depending on needs.
Custom versions available. 16:1 also available as Balun output.
