Product Description & Reviews
CHOKE-KIT! is a simple & effective way to reduce or eliminate unwanted RF from being conducted back into the shack when installed either near the antenna feedpoint and/or the rig. It is a quality, pre-assembled high power current balun, which provides approximately 24 microhenries of "common-mode" inductive reactance. "Common-mode" means CHOKE-KIT! will only attenuate unwanted RF power present on the coaxial feedline & not affect the RF power you want to deliver to the antenna. It's perfect for dipoles, G5RV's, loops & installations where the unbalanced coaxial feedline interfaces with the balanced portion of the antenna. It will also reduce RF introduced on the feedline due to close proximity to other radiating sources such as power line noise or other adjacent HF transmitting antennas. The secret behind CHOKE-KIT! is the premium ferrite material, which won't saturate under high power & high VSWR. Five ferrite cores provide inductance equal to over 28 feet of RG-8 coax wound in a nine-turn coil. This means less wind loading when used at the antenna feedpoint & less clutter when used at the rig. It won't couple RF into other nearby objects when properly installed. Use of high performance materials allows CHOKE-KIT! to provide reasonable attenuation of unwanted RF on coaxial feedlines well into the VHF bands with minimal power loss. Every effort has been made to ensure years of trouble free operation, however there are a couple things to remember: Be sure to use adequate coaxial waterproofing sealant when using outdoors; UHF connectors are not waterproof by themselves; Don't drop on a hard surface - the ferrite cores, like any other ceramic material, will crack if handled roughly; Don't use this device to support wire or cable weighing in excess of 10 pounds without a strain relief as the connectors may pull off the cable; For more inductance, "N" type connectors, or to purchase the cores separately for DC power line filtering & other uses, please ask.
Features & Highlights
- Frequency: 1.8 - 300 MHz
- Applications include:
- Feeding dipoles, loops, or other similarly balanced antennas with unbalanced feedlines (coax).
- Reducing unwanted RF due to feedline proximity to antenna elements (low height dipoles, etc). Reducing man-made noise (computers, lamp dimmers, etc) conducted from the shack to the antenna by the feedline.
- Great for emergency "Go" kits when deploying less-than-optimal antenna installations (no counterpoises, poor grounding).
Additional Information
| Manufacturer: | Ni4L Antennas & Electronics |
| Brand: | Ni4L Antennas & Electronics |
| Model: | choke160-6 Line Isolator |
| Part Number: | choke160-6 Line Isolator |
| Publisher: | Ni4L Antennas & Electronics |
| Studio: | Ni4L Antennas & Electronics |
| MPN: | choke160-6 Line Isolator |
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