Common mode chokes
This ATU Choke BalUn Self-Build kit 800 watts provides optimal symmetry in the power line. The BalUn is designed to be used in conjunction with an antenna tuner
Frequency range: 1 – 54 MHz
Suitable up to 800 watts
1 – 30 MHz Common mode choke DIY kit
Frequency range: 1 – 30MHz
Suitable up to 800 watts
Impedance: 50 OHM
There are many types of common mode chokes available, HF Kits opts for a common mode choke with bifilar windings for optimal filtering. This 1 – 30 MHz common mode current filter is optimized for the 80 and 160 meter band. This filter performs very well on the entire HF spectrum. The attenuation is therefore around 30 dB across the entire HF frequency spectrum. This filter is therefore a real all-rounder for amateurs who want to work from 160 meters to 10 meters.
Click here for a construction manual of this common mode choke
This kit contains all the parts to build this bifilar common mode choke. With a handy fixing plate for the toroid, so no longer necessary for gluing. See the complete parts list and details about this filter at the bottom of the page in the product description.
3 – 30 MHz Common mode choke self-assembly kit
Frequency range: 3 – 30 MHz
Suitable up to 800 watts
Impedance: 50 OHM
There are many types of common mode chokes available, HF Kits opts for a common mode choke with bifilar windings for optimal filtering. This 3 – 30 MHz common mode choke is optimized for the higher bands (40 to 10 meters). In this case a FT240-43 toroidal core is used which makes the 3 – 30 MHz common mode current filter perform very well on the entire HF spectrum. The attenuation is therefore over 30 dB across the entire frequency spectrum. This filter is a real all-rounder for amateurs who want to work from 80 meters to 10 meters.
Click here for a construction manual of this common mode choke
This kit contains all the parts to build this bifilar common mode choke. With a handy fixing plate for the toroid, so no longer necessary for gluing. See the complete parts list and details about this filter at the bottom of the page in the product description.