The RU-1:1 is a 1:1 Unun intended to help remove unwanted RF from the coax cable shield. It is normally used as a common-mode RF choke for short coax cable runs or non-resonant antennas. The RU-1:1 features SO-239 sockets for both input and output.
1:1 Unun (The Choke)
The most common balun. It does not change the impedance; it simply ensures that the RF current on the two sides of a balanced antenna is equal and prevents "common mode" current from flowing back down the outside of your coax.
- Best for: Centre-fed Dipoles, Inverted-Vs, and Yagi antennas that naturally have an impedance near 50 Ohm.
- Function: Prevents the coax shield from becoming part of the antenna, which reduces RFI (interference) in your shack.
We love customer feedback: Another excellent product from LDG. It works excellent when you want to stop RF flowing back to your transceiver
Specifications:
- Configuration: 1:1 Unun
- Frequency Coverage: 1.8 to 30 MHz
- Power Range: to 200 watts PEP (SSB), 40 Watts Data Modes
- Easy to weatherproof
- Enclosure Size: 5” x 2.5” x 1.25”
- Weight: 6oz (with enclosure)
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Package:
1x LDG RU-1:1 UNUN HF Common-mode RF Choke