HF QRM Eliminator X-Phase 1–30MHz Kit

Name: HF QRM Eliminator X-Phase 1–30MHz Kit
SKU: 38847
Price: 72.88 USD
Availability: InStock

Eliminate HF noise with precision—X-Phase QRM Eliminator (1–30MHz) with phase control, PTT, and DIY-ready SMA kit

Designed by YIHANG in China

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Eliminate HF noise with precision—X-Phase QRM Eliminator (1–30MHz) with phase control, PTT, and DIY-ready SMA kit

What is it? The HF QRM Eliminator X-Phase is a high-performance interference cancellation device designed for radio enthusiasts and amateur operators working across the HF spectrum (1–30 MHz). Built…

What is it?

The HF QRM Eliminator X-Phase is a high-performance interference cancellation device designed for radio enthusiasts and amateur operators working across the HF spectrum (1–30 MHz). Built into a durable aluminum alloy housing and designed with DIY flexibility in mind, this QRM Eliminator connects seamlessly between your transceiver (TRX) and antenna without requiring any internal modification to your radio. Its core purpose is to suppress man-made QRM (interference), which often plagues urban and suburban radio environments. Using a combination of a main antenna and a simple auxiliary antenna (such as a telescopic antenna or a short piece of wire), the X-Phase system enables phase and amplitude adjustment to cancel out unwanted signals before they reach your receiver's front end. Whether you’re operating from a dense neighborhood or experimenting with complex antenna setups, the X-Phase Eliminator empowers you to restore signal clarity and enhance your HF listening experience.

Why did you make it?

We designed the HF QRM Eliminator X-Phase with the DIY ham radio community in mind—especially those who want a plug-and-play solution for local noise problems without modifying their precious equipment. Many commercial transceivers do not include advanced QRM filtering, and even high-end rigs can suffer when faced with neighborhood powerline interference, switching power supplies, LED lighting, or plasma TVs. This Eliminator allows amateur operators to leverage basic signal cancellation theory in a practical, hands-on way. The built-in PTT circuit ensures that the unit remains safely bypassed during transmission, while providing optimal signal path routing during reception. Tindie users are curious, technical, and often enjoy tweaking hardware to get the best performance. This tool aligns perfectly with that mindset.

What makes it special?

Wide Frequency Support: Covers the full HF spectrum from 1 to 30 MHz, ideal for shortwave, amateur bands, and general-purpose HF listening.

Zero Modification Required: No need to open or modify your transceiver. Simply connect between your TRX and antenna.

PTT Auto-Bypass Functionality: Integrated Push-To-Talk control ensures safe operation during transmit—automatically bypassing the Eliminator to protect your gear.

Dual-Antenna Phase Cancellation: Uses signal phase difference between your main and auxiliary antennas to neutralize QRM before it reaches the receiver.

Adjustable Phase & Amplitude: Fine-tune cancellation levels using front panel controls to match your specific interference pattern.

DIY-Friendly: Includes everything you need to get started—telescopic antenna, power cable, SMA adapters, and more.

Durable Build: Compact aluminum alloy enclosure with FR4 epoxy fiberglass front/rear plates—built to last under field conditions.

Product Compatibility: This QRM Eliminator is compatible with a wide range of HF transceivers, SDR receivers, and amateur rigs that operate within the 1–30 MHz frequency band. Works seamlessly with: Icom, Yaesu, Kenwood, Elecraft transceivers SDR platforms such as SDRplay, HackRF, and RTL-SDR (HF modified) Direct conversion receivers and QRP setups DIY receiver kits or custom rigs with standard antenna input/output lines The included PTT cable allows automatic bypass during transmission, making it ideal for full-duplex HF systems or SSB operation.

Technical Specifications:

Frequency Range: 1–30 MHz (HF Bands)

Enclosure: Aluminum alloy body; FR4 epoxy fiberglass front and rear panels

Dimensions: 125 × 110 × 51 mm (excluding connectors)

Packaging Weight: 635g

Packaging Dimensions: 20 × 19 × 6 cm

Note:

To achieve optimal QRM cancellation, you must use an auxiliary receive antenna. This can be a 2-meter band antenna, a telescopic whip, or even a wire a few meters long placed indoors. The greater the phase difference between the unwanted signals arriving at each antenna, the more effective the cancellation. Proper adjustment of the phase and gain controls on the front panel is essential for achieving best results.

Avoid transmitting through the Eliminator without proper PTT bypass connection. This device is designed for receive-path QRM suppression and must be bypassed during transmit cycles to avoid damaging your equipment.