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Your cart is empty. The K9DP QRP broadcast interference (BCI) filter allows QRP (low-power) amateur radio operators to reduce or eliminate unwanted broadcast interference in their signals. Primary designed to help HF radios and receivers that struggle with front-end overload from AM broadcast stations, compatible with Xiegu X6100, X5105, G90, G106 and SDR receivers.
This lightweight and portable filter is ideal for use in field operations such as Parks on the Air (POTA), Summits on the Air (SOTA), and Field Day. It has been tested at power levels up to 20 watts with SSB, CW, and digital modes, and its small size and low weight make it easy to take with you wherever you go. Measuring only 3.4 inches (86mm) in length and weighing just 30 grams, it's a convenient choice for on-the-go operations.
Overall, this filter is a great way for radio operators to enhance their radio’s performance and improve their communication experience. These filters have a 50Ω impedance and are symmetrical, so it's not important which end is the input or output.
Caution: High SWR can damage the filter. The filter should be inserted inline between the transceiver and tuner, rather than between the tuner and antenna. If your radio has an internal tuner, be sure to use a resonant antenna or an antenna with a matching circuit, such as an EFHW (end fed half wave), in combination with the filter.
James
Reviewed in the United States on March 12, 2025
This is a much needed device for my Xiegu X6200! When I am on battery power, the AM signal can bleed in pretty bad, but with this they magically go away! I'd like to see a right-angle one eventually, or built into a vertical antenna.
Customer
Reviewed in the United States on February 4, 2025
I suppose that this works. I got it for the Xiegu G106 which people complain about AM broadcasts interfering with, and decided against keeping that rig. It did not have the problem here, but we don't have any radio stations nearby.It did not affect SWR when it was inline. It is for QRP stations and mine exceeds the wattage of this device so I returned it.I don't have anything bad to say about it.
M.E.Porter
Reviewed in the United States on July 19, 2024
My husband needed this for his Ham Radio gear! Great price and exactly what he wanted!
Murphy
Reviewed in the United States on February 24, 2024
Just buy it, even if AM isn't your problem, Its a great filter.
Craig Meddings
Reviewed in the United States on January 29, 2024
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Richard Truche
Reviewed in the United States on September 29, 2023
This took my x6100, and cut the AM interference right the heck out!It works well, it’s has the right gender on each end, and is worth more than its weight in gold to me.Thank you for selling these in such a convenient package and convenient location!
Customer
Reviewed in the United States on December 31, 2023
I had my General Ham license for awhile but until now could not make any HF contacts. My home is near a high powered AM broadcast station. It overloaded the receiver of my G90 and all I could hear was the AM station. But I installed the filter and now I am making contacts!
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