These tests and experiments were performed by Ian Jackson VK3BUF in the QRM Guru test lab. Much has been said about the importance of applying ferrite clamps, rings and beads to radios and other domestic products to fight QRM. Articles on the correct placement of ferrite noise suppressors are common, but little has been written […]
Category: Step 3 – Noise reduction in your shack
HF/VHF Station QRM Kill Kit
The kit includes: 1 x 61mm ferrite core 2 x 50mm ferrite core 5 x large ferrite snap-ons Application notes on the effective use of ferrite filters This kit will help you reduce QRM from your transmitter, as well as reducing or even eliminating local QRM affecting your receiver. These will be particularly effective is […]
Eliminate Interference with the MFJ-1026 Noise Canceller
A great demonstration video from Hayden VK7HH and this Noise Cancelling device in a real world scenario. Thanks Hayden.
Finding and killing QRM in the home with ferrite toroids & snap-ons
From Josh KI6NAZ Josh has put together a great Youtube video on reducing RFI in and around the house. Using simple techniques to find the noise source and then using toroids and snap-ons to reduce or illuminate the noise. A very useful video. “For most of us, RFI is around us all the time. It […]
The best thing you can do to reduce noise in your radio shack
We’ve spoken about the importance of having good house-keeping in your goal for a low noise environment. Other posts on QRM Guru talk about various techniques and tools you can use, but in this video Peter, VK3YE provides a great practical demonstration of how you can reduce noise in your shack. Using Ferrite rings and […]
Using baluns to minimise noise
Whilst a balun is usually associated with reduced unwanted transmission line radiation (eg. from the feedline and power cord), a balun can also help minimise unwanted noise picked up by your feedline. This short video provides a practical demonstration. With thanks to Davide IZ2UUF. You can purchase commercial baluns or make your own. There are […]
Using grounding to minimise noise
Good RF grounding should provide a low resistance path to ground for any RF noise which is present. A low resistance path to ground ensures that the noise is conducted away to ground instead of being radiated. In addition, your station should also have a quality low resistance path to ground. Refer to this link […]
Using chokes & ferrites to minimise noise
Many well qualified professionals and experienced hams have written excellent reference articles on this topic. Below are a small selection of highly regarded technical references. Some are highly technical in nature, but also provide an insight for beginners. At the bottom of this page we provide links to some suppliers, both local and international. This […]
Reducing noise in the shack
That Horrible Noise The first place to address unwanted noise is in your own shack. This process begins when you design and set-up your radio shack. Consider non-RF noise as well; try to locate your shack away from the TV, living room or kids bedrooms. Use the following guidelines as a starting point: Earth […]