4 Dandaloo Steet, Kariong NSW 2250
+61 (02) 4340 2500
ccarc@ccarc.org.au

Technical Corner

Central Coast Amateur Radio Club

Interesting technical articles

Seeing the good in Solar winds at the bottom of the sun cycle

It is normal that strong ionised particles escape the sun during a solar flare-up. The number of sunspots (bright spots visible on the sun) that indicate the flare-ups vary over a cycle which can be as short as 7 years or as long as 11. More sunspots equate to a consistent re-charging of the Earths Ionosphere and hence better DX conditions around the globe within the Ionosphere.

Monitoring short range propagation

More often than not, in the Amateur radio Hobby, we are looking to see when the space weather is going to help us make distant (DX) contacts. There are however times when long skip distances are not what we want!

Testing the losses of Multi-coupler’s, Splitter & Low Pass Filter

My Stridsberg (USA) Receiver 8 port multi-couplerfailed and being unsure of where to procure the LNA replacement and unable to find information, I replaced the unit with a substantially more affordable 5 port unit from the UK manufacturer Cross Country Wireless.