Amateur Radio Stories
The endfed antenna has become one of the most popular choices among amateur radio operators in recent years. Its ability to cover multiple bands and its easy installation often make it the first antenna many radio amateurs put up. But there is one major drawback: the endfed antenna is highly Continue reading Endfed Antennas, QRM, and How to Improve Your Reception
For more than eight years I have been battling manmade noise, or QRM. In this, I am not alone. The entire ham radio world is experiencing a rapid increase in manmade noise. The result of the many electrical devices used in the home. From phone chargers to LED lights and Continue reading Using AI to eliminate noise in a radio signal
You often hear about it and it is a hot topic on forums, repeaters and club gatherings. I have interference (RFI) on my equipment or that of my neighbors caused by my own radio signal. What can I do about it? First of all, the best strategy is to tackle Continue reading How to prevent RFI caused by EndFed, vertical and dipole antennas
It has been around for a long time, but is only used on a small scale in the ham radio world; diversity reception. This is a pity, because diversity reception not only offers the possibility to reduce QSB (fading). With diversity you can also eliminate QRM (manmade noise) very effectively. Continue reading Getting rid of QRM with diversity receive mode
It’s becoming more and more a standard part of the average radio amateur station, the X-phase QRM Eliminator. In the fight against manmade noise on HF, a QRM Eliminator can be an excellent tool. Ay least, if the noise source is close by and that it is also a single Continue reading Tips on how to operate and finetune a QRM Eliminator
Past time my focus was on resolving the interference caused by neighbors’ two solar panel installations. Last year I bought a QRM eliminator with which I, in combination with a Miniwhip active antenna as auxiliary antenna, achieved good results on a decent part of the HF spectrum. But the interference Continue reading How the replacement of solar panel micro inverters lead to 50 dB less QRM
In a previous post I did a review on the X-phase QRM eliminator. I found out that the antenna for receiving QRM, the auxiliary or secondary antenna, holds the key to optimum performance of the QRM eliminator. A single wire along a shelf in your shack is, for what I Continue reading Boost your QRM eliminator performance with an active antenna
If you see figures regarding solar activity, you could conclude that we are very close to the start of a new solar cycle. That means within a few years my beloved 10 meter band will open up again for DX. But I have also been struggling for four years with Continue reading Review of the QRM Eliminator X-phase
Spring 2015, there could be a crisis on its way. I home from work to find out my next door neighbour installed two solar panels on his roof. A ‘DIY plug and play’ type which you only need to plug in the wall. Well, you probably know that solar panel Continue reading When the noise came banging in
LED lighting is probably the most sustainable way of bringing light into your life. Power consumed by LED is only a fraction of that consumed by a conventional light bulb, with the same amount of light. And what about the lifespan. A quality LED can last a lifetime. Blue-ish white Continue reading LED lights, a sustainable radio disaster