Common mode choke with bifilar windings for optimal filtering.

1 – 30 MHz Common mode choke [optimized for the 80 and 160 meter band]
Frequency range: 1 – 30MHz
Suitable up to 800 watts
Impedance: 50 OHM
This 1 – 30 MHz common mode current filter is . 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.

3 – 30 MHz Common mode choke [optimized for the higher bands 40 to 10 meters.]
Frequency range: 3 – 30MHz
Suitable up to 800 watts
Impedance: 50 OHM
This 3 – 30 MHz common mode current filter is . 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 80 meters to 10 meters.

I bought both kits by hfkits