RF Limiters and Receiver Front-End Protectors

RF Limiters and Receiver Front-End Protectors

David
Reviewed by • Senior RF Engineer & Technical Editor • March 2026

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  • RF Front End Protector
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    RF Front End Protector — OK1RP
    If You are using a separate receive antennas then you need a good protection circuit to eliminate the possibility of blowing out the receiver front-end while using these auxiliary receive antennas specially on low bands.
  • A Transceiver Front-End Protector
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    A Transceiver Front-End Protector — AD5X
    A transceiver front-end protector in high signal level environments. An homemade RF limiter to protect your receiver front-end from high radio frequency.
  • KD9SV Front End Saver
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    KD9SV Front End Saver — WY3A
    Homemade RF limiter project, to protect the K3 receiver front-end for high radiofrequency based on the original KD9SV project.
  • Receiver Protection in SO2R and Beverage Antennas
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    Receiver Protection in SO2R and Beverage Antennas — N4KG
    How to protect your receiver when operating in SO2R and using beverage antennas. A custom protection box made with two resistors and 2 stack of diodes.
  • RF Clipper for Receiver Protection Device - KK5JY
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    RF Clipper for Receiver Protection Device - KK5JY — KK5JY
    This page discusses a simple receiver protection device designed by Matt Roberts for hams. The article details the purpose, construction, and usage of the RF clipper, providing useful information for ham radio operators looking to protect their equipment from RF overload. The content is practical and informative, offering a solution to a common issue faced by hams.