Category: Uncategorized

WG0AT at Cape Cod

It was great to see that Steve WG0AT visited Eastham Lighthouse, as shown in this video.


Visiting these guys was one of my formative experiences in Amateur Radio (back when the ink was barely dry on my Foundation license).  Congratulations to Barbara on her new call as well! 

QRM on 70cms

After suffering QRM on the Bracknell 70cms repeater, GB3BN, for several months now, it was interesting to note that within several days of us finding the cause, a similar case was reported elsewhere.

The interference is noticed as a regular “chuffing” sound whenever the repeater is open but isn’t being overriden by a stronger signal.  Thanks to the excellent efforts of the TVRG, the QRM was been traced to a building site in Harrow on the Hill, where the 10mW transmitters on top of the cranes there have a direct line of sight to the GB3BN antenna high above Coppid Beech roundabout.  The transmitters appear to be linked to a crane collision avoidance system, tranmitting in this case on the GB3BN input frequency of 434.6MHz.

It was interesting, therefore, to read this report from G4UVJ about a similar problem affecting 433.5MHz in the Thames estuary area.  I wonder if it’s the same system in both cases?