Newcomers start here

Are you new (newbie, FL) to Amateur Radio and don’t know where to start?  Start here… If you’re new to Amateur Radio you’re likely overwhelmed with all manner of information and options on where to start.  More than likely, if you live near a city, or in the suburbs, and you operate on HF, you’re […]

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List of Tools

Here is a simple list of tools you’ll need to start searching for noise: a small DF loop, like this one for VHF and UHF, a Yagi or other directional antenna. Say something around 8db gain a simple wide band AM receiver or a 2/70 handheld for higher frequency work the new Nano VNA could […]

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QRM Guru Videos

All these instructional videos are accessed from various posts on this website. They a presented here in chronological order as a instructional series.   Video 1 – An Introduction to Interference Video 2 – DF Loop Construction Video 3 – Gathering Information Video 4 – Locating the noise source Video 5 – Complaints Processes Video […]

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Latest News – November 2019

2019: RASA celebrates attending 10 clubs across five states in 10 months to demonstrate QRM Guru November 2019: New article for newcomers, newbies and FL.  Intro to QRM. November 2019: Excellent article on dealing with LED downlight noise November: RASA to visit Rosebud RadioFest in VK3. September: RASA sceduled to visit Hornsby Radio Club on 24th […]

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The Process

QRM.guru is an aid in the search, identification and removal, reduction and hopefully elimination of electrical noise around the home and surrounds, and more particularly interference to the amateur radio station. It is suggested to read the “Start here” page first then investigate sections of the site that interest you.   If you’re wanting to […]

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Locating noise in your home

If your noise source is limited to your home (and property) then you’re in luck.  You have much greater control over how the noise can be resolved. Follow this simple procedure to locate the noise. Power your receiver with a 12v battery so you’re independent of the mains supply You can start by turning off […]

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Example – Basic Diagnosis

This is a simple example of how you might conduct the first step in identifying the noise/s.  John has moved to a new QTH has has some noise issues. John is using the log sheet and profiling sheet found under Templates.  He is keeping a detailed journal. John notes that every time he turns on […]

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Identifying the noise – Useful links

This post provides links to some useful sites and resources to help you identify your noise.  Please send us any additional resources or links you know about. Two common and sometimes misunderstood terms (or Q-codes) are QRM and QRN.  The images below provide a high level explanation of the difference between QRM and QRN. This […]

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Basic Diagnosis – Start here

Radio Frequency Interference (RFI) or noise, has become one of the single largest impediments to HF operation in any urban environment.  This article covers the basic philosophies to help you identify and (hopefully) resolve your noise issues. This is not about throwing your arms up in despair and moaning “every time I turn on 40m […]

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