Amateur Radio

GB3GU 70 cms Repeater 

A repeater can receive a weak signal, or a signal from a portable or mobile user, and re-transmit it over a wider area. A repeater listens on a particular frequency, called the Input frequency. If it hears a valid signal, it will re-transmit the signal on the Output frequency. Only one person should transmit at a time, otherwise the signals will be lost.

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160m Receive Pre-Amp

After deciding to operate on 160M I was searching for a pre-amp to use with my newly built 160M receive only loop.

It was recommended that I try the Pre-amp designed by KD9SV this is a pre-amp with variable gain so i set about trying to build an example.

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DX Cluster’s GB7DXG-1 & GB7DXG

A DX Cluster is in essence a “chatroom” or node into which amateur DX hunters can post information about DX either worked or heard. Physically, it is a central computer that collects, stores and disseminates information that hams send to it. There are thousands of nodes around the world, connected together via the internet or radio. Connection to a cluster is by either telnet or packet radio.

Click here for live Dx Cluster data

 

Links

Click here for my list of favourite component suppliers and websites.  

4 Meters

 

ADSB Aircraft Tracking 

It is now possible to track aircraft within a 200 mile plus radius and plot their positions on a real-time display. There is a caveat, however the tracked aircraft must employ a special ADS-B transmitter that continually transmits the aircraft’s flight parameters. 

To see aircraft received by me in the Channel Island area click on the ADSB link