Part 1 discusses getting started, Part 2 looks at the messages received. Many of the messages are simply “TEST” messages, this is because it is mandated the systems must be tested at regular intervals. The positive side is the number of messages being exchanged is quite high, and so it doesn’t take long to record […]
Monitoring (GMDSS) Global Maritime Distress and Safety System
GMDSS send messages on the HF and VHF bands using Digital Selective Calling (DSC). The system utilises a number of HF and VHF frequencies to provide global coverage. 2187.5 kHz 4207.5 kHz 6312.0 kHz 8414.5 kHz 12577.0 kHz 16804.5 kHz Ships at sea are required to monitor 2187.5 and 8414.5 but often monitor all of […]
Broadcast Overload on Kiwi SDR
The Kiwi SDR and Wellbrook loop provide a very good single antenna solution for 0 to 30 MHz shortwave reception. The Kiwi is capable of displaying the complete band of 30 MHz, but the disadvantage is the very high power from some of the LW and MW stations can cause the receiver to overload in […]
SSB NFD with G3PYE
The Camb-Hams operated from a new site this year, due to their usual site being unavailable. The location had good unobstructed views, the local area is very flat but it did have such a good elevated VHF take off. The event falls at the end of the year and providing a chance to catch and discuss […]
LEFARS and SNBCG Big Radio Weekend
Once a year the LEFARS crew and SNBCG come together at the Secret Nuclear Bunker Kelvedon Hatch for a big radio weekend. It’s the last chance to play some radio over a bank holiday weekend in 2018 before winter arrives! On Saturday we had a BBQ for 25 people, giving everyone a chance to catch up […]
HF fun with the 18 MHz beam
The addition of a beam on HF never ceases to bring a smile to ones face, the addition of a linear amplifier is often enough to create a pile-up. If you look around at some of the amateur radio publications you will often see people complaining about the conditions or the lack of propagation. Undoubtedly […]