20 Feb. 2025 – A talk by the Construction contest winners




David G4FKI started the presentation by showing his CW Beacon from a design by G4JNT. As a relative new member of the club he has never had an opportunity to enter before, hence his entry in the oddly named ‘novice’ class.

David’s CW Beacon

Don, G4LOO decided to explain all of his entries starting with the smallest, the Clamp on current meter for testing for current on coax or RF on wiring etc.

Don’s coax Current meter

Next was his Coaxial Cable Tester. Although rather simple in design it is very useful in testing any terminated cable with any type connector to check continuity.

Much more complicated was Don’s Kit entry, a GPS Disciplined 10MHz Frequency Standard built up from various modules. Don explained the circuit diagram but to this writer it was much too complicated to follow.

Don's GPS Frequency Standard

Don's Power MeterAnother kit project was the 10MHz to 18Ghz Power meter.

One of Don’s Major Project entries was the Headset Mixer, which sounds simple but in reality contained a myriad of parts to allow amplification of headsets and microphones to allow two operators to hear and speak to each other while listening to the receiver and allowing to main operator to transmit audio.




Last but not least was the Easy – 100 No Tune 70cm to 2.4GHz up link converter for QO-100 Satellite. Easy is an understatement when you see all the modules connected up. This was indeed Don’s Major Project!Don's Satellite Frequency Mixer