About Jean-Paul Suijs - PA9X

Jean-Paul. Radio amateur, VERON member. HF, radiowaves, propagation, antennas. Amateur astronomer. Principal Marketeer. Rotterdam Port area, JO21ev.

Why WiFi repeaters do not guarantee fast internet

A poor WiFi signal

If you have mobile devices like your smartphone, or you have a laptop, you probably run a wireless network. Concrete, bricks and metal will limit the range of your WiFi signal. Installing one or more WiFi repeaters guarantees a strong signal, but does not guarantee high speed. Here is why. Continue reading Why WiFi repeaters do not guarantee fast internet

LED lights, a sustainable radio disaster

LED light

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

The liquid HF vertical for 10m to 40m

I love HF and my QTH is not that good for harbouring a lot of antennas so I can work each band. I do have a trap HF vertical but it is a pain in the … Corrosion makes this antenna untunable to resonate.The ideal antenna would be a vertical Continue reading The liquid HF vertical for 10m to 40m

Better DX hunting with a 14 US Dollar SDR receiver

I am a big fan of the 10m band.  An extra receiver would be nice to listen on 10m, so I can use the TS-480HX to listen across the HF bands. But with a second receiver, you probably need an extra power supply and extra space in your shack. A Continue reading Better DX hunting with a 14 US Dollar SDR receiver

Long path propagation or short path propagation on HF?

Chordal hop propagation

Past months propagation improved, resulting in relative good propagation on HF. Those who have DX ears must have noticed that 10m long distance propagation acted in a more or less remarkable way. Fellow DX’ ers on forums reported signals with multiple echoes that are certainly not from a CB echo Continue reading Long path propagation or short path propagation on HF?

Has Solar Cycle 24 finished?

Sunspot Cycle 23 and 24 progression

Those who are daily active on the 12m and 10m band must have noticed that propagation was relatively good even excellent during the 3rd and 4th quarter of 2011. The bands, including 6m, were wide open for long range contacts. I observed long path QSO’s, “around the world trip” echoes Continue reading Has Solar Cycle 24 finished?

Nice propagation to test the Moxon antenna

Lucky me!!! No better way to test the homemade 10m Moxon antenna then with current conditions. Best propagation since 2003, definitely! I took the chance to do one on one tests, and results are a bit surprising in a positive way. But first of all for the right comparison: Moxon Continue reading Nice propagation to test the Moxon antenna