QRM.guru has been developed to assist Radio Amateurs in dealing with RF noise and interference.  This is an educational and reference resource.  The information provided on these pages is not unique or regarded as a new discovery.  QRM.guru and the developers provide the information on these pages in good faith and obtain no monetary benefit for their efforts.  QRM.guru is a volunteer powered resource.

If you’d like tech support with a QRM issue please raise a ticket with an email to [email protected] – be sure you provide as much information as you can – and please make sure you’ve performed the basic diagnosis and problem solving steps in the process.

If you’re a Radio Amateur and simply want to get started, then visit these pages

The QRM Guru Process

Our introductory videos

If you’re new to the hobby and not sure where to start visit this page.

Much of the content has been derived from various sources, including the public domain, published works and project work by developers and radio amateurs.  All references to published works and project work are acknowledged.

The objectives of QRM.guru are to provide an integrated online educational resource to assist all Radio Amateurs in:

  • better understanding RF noise (EMI) sources that impact on their enjoyment of the hobby;
  • providing a series of tools, techniques and guides to assist in locating and reducing or eliminating noise sources;
  • providing guidance on how to select consumer devices that comply with regulations and do not emit unwanted RF noise;
  • encouraging radio hams and clubs to collaborate in reducing noise and promoting the hobby;
  • developing and utilising our technical skills to resolve issues that impact on our enjoyment of the hobby, even when the interference is not of our responsibility;
  • assisting VK Amateurs in getting more enjoyment out of the hobby.

Users are invited to provide feedback and additional content to make this resource more useful for all radio hams.  If you have any case studies, methods or experiences that may add to the overall value of QRM.guru, please send us an email with details.

Whilst QRM.guru has been developed in VK, it will be of use to hams worldwide.

Please feel welcome to surf this website.  Check out various pages, forms, videos and links.  If you find an error, broken link or something you think could be done better, please drop us an email.  This is a resource for hams, by hams.


The developers of QRM.guru acknowledge the following reference sources:

  • Elimination of Electrical Noise (Don Pinnock, RSGB)
  • ARRL Handbook (ARRL)
  • Low Band DXing (Delvodere)
  • RSGB Radio Communication Handbook (RSGB)
  • Interference Handbook (William Orr)
  • RFI Handbook (ARRL)
  • QST (ARRL)
  • http://www.ukqrm.org.uk

QRM.guru acknowledges and thanks the many ham radio enthusiasts and other sources who have made information publicly available on the internet.  QRM.guru references many external links as useful sources of information, however, cannot be held responsible for the accuracy or results of any such references.  If you find any broken links please email us and we’ll do our best to find a replacement reference.  The developers and contributors provide all information in good faith and for educational purposes.  We cannot be held liable or responsible for individual results.  Please exercise common sense and safety when dealing with electrical appliances, climbing on structures or liaising with neighbours.

All contributors will be acknowledged.  This resource is for hams, by hams.  With thanks to: VK2CA, VK3XP, VK3BUF, VK3QB, VK4DU, VK3YB, VK3BRW, VK3GHM, VK3NCC, VK3MET, VK3RU, VK6NAD, VK3YBA, VK5HCF, VK5SFA, VK3FS, VK6AS, VK3YE, VK5GR, W1HIS, KI6NAZ, VK7HH, G8AOJ, VK5KLT, KP4MD, VK3GB, VK3AMN, VK4DU, VK2BFC

Also, thanks to ARRL and RSGB for permitting QRM Guru to share copyright material.

Last update: 19 July 2022