RF Low-Pass Filter for Shortwave Radios — clean, reliable HF performance Key benefits Reduces out-of-band emissions and improves signal purity during transmission, helping meet interference and regulatory requirements. Supports reliable high-power operation up to 100 W, so you can transmit without degrading filter performance. PCB construction with a large heat-dissipation area for efficient cooling and longer component life under sustained use. Manual tape switching makes band selection quick and intuitive—no tools or menus required. Main features Frequency range: 5 MHz to 30 MHz, covering the full shortwave/HF band used by most shortwave radios and transceivers. Rated power: 100 W continuous handling capability. Band switching: manual tape change with selectable positions for 80 m, 40 m, 20–17 m, and 15–10 m bands. Construction: PCB-based design featuring an expanded heat-dissipation area to reduce thermal stress and extend service life. Why you need this filter Keeps transmitted energy inside the intended HF band, reducing harmonic and spurious emissions that can cause interference to other services and receivers. Protects downstream equipment and antennas from unwanted signals while preserving transmitter output quality at up to 100 W. Simplifies band changes with a straightforward manual selector so you can adapt quickly during operations without complex reconfiguration. Compatibility and performance Designed for use with shortwave radios and HF transceivers operating across 5–30 MHz. Performs reliably at rated power thanks to effective PCB thermal management; suitable for base stations, portable setups, or fixed installations where consistent filtering and cooling are needed. Typical use scenarios Amateur radio base station: Install inline between transceiver and antenna to lower harmonic emissions during contesting or high-duty-cycle operation. Field/portable operations: Use with portable shortwave setups to ensure clean transmissions across 80 m through 10 m bands while managing heat in a compact PCB package. Station upgrades or repairs: Add or replace an LPF in an existing station to restore spectral purity and protect antennas and receivers from out-of-band energy. Specifications (concise) Operating frequency: 5 MHz to 30 MHz Rated power: 100 W Band selections: 80 m, 40 m, 20–17 m, 15–10 m (manual tape switching) Construction: PCB with large heat-dissipation area Practical notes Manual band switching requires selecting the appropriate tape position for the desired amateur band before transmission. Intended for integration with shortwave/HF radio systems; ensure correct inline placement between transmitter and antenna for optimal filtering.