Using Chokes & Filters to suppress noise – a great reference

A VK6 member found this very useful reference on noise suppression.  Full acknowledgements to G8JNJ. Whilst this document has been written from a UK perspective, it is very useful for: noise suppression in consumer appliances & switch mode power supplies reducing noise in the shack using ferrite rings to suppress noise understanding RFI G8JNJ Notes […]

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Noisy fluorescent lights

Here is an example of fluorescent light RFI; thought to be RF quiet, but in reality far from amateur radio friendly.  Even though the observed noise on the radio was low, this is an example of “just another” noise source adding to the overall rise in the noise floor.     Key words: Fluro lights

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Recommended consumer products

The following consumer electrical items have been reported as “amateur radio friendly” by VK Hams.  QRM.guru and the developers are unable to independly verify these products and have published these items in good faith. VK hams have happily recommended the following LED lights. Nichia MR16 12v. With retrofitted iron core transformers SAL Wave S9065TC Dimmable […]

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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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Consumer Electronics

We are overrun with RF radiating consumer electronics.   They have invaded every part of our domestic, commercial, manufacturing and automotive lives.  Globalisation of product markets has had a marked negative impact on compliance standards and quality contol. We are surrounded by so much of this equipment that it has become ubiquitous; to the extent […]

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