CUBE Feed Line Choke, 1:1, 1.5KW PEP, .5-5 MHz, AM Broadcast Filter
1500 Watt Rated 1:1 CUBE™ Choke - .5-5 MHz
Th CU-1-1500BC unun is useful as common mode feed line chokes or coax to antenna interfaces. SO-239 output models can also be used with balanced antennas if a short coax cable “pigtail” is used on the output and connected to the antenna. Rated 1500 Watts PEP from .5-5 Mhz. Use as line isolator, antenna interface, or as a common mode choke to keep RF on the antenna and off the outside of the coax braid. Much more effective then our sleeve feed line chokes due to multi-turn toroidal topology using high permeability ferrite cores which provides a higher choking impedance over a broad frequency range. Typical choking impedance of 2K-10K from .5-5 MHz reduces common mode current! For most effective results, use 1 choke at the antenna and another at the radio end of the coax. Helps reduce noise floor too by choking off common mode neighborhood noise picked up on outside of coax braid.
Available in 1.5K and 4K PEP models
4K version shown identical to 1.5K PEP - graph is very similar
Typical user comment:
The filter was quite effective. Was surprised that it actually reduced the noise level more than the signal so S+N/N improved by 1.9 S units. Bill