Shed Workshop 13 June: An antenna ecosystem and Constructing a simple SSB Transceiver

Controlling field equipment under an ecosystem approach

The June Shed Workshop was held a week later than usual – from 1pm to 3pm on Sunday 13 June 2021 at Mike ZL1AXG’s QTH due to Queen’s Birthday weekend getting in the way.

Mike ZL1AXG and Bernard ZL2BD gave an introduction to the concept of an antenna ecosystem, in which a range of antennas could be controlled by a single microprocessor control system.  This includes remote antenna switches (with just one antenna cable into the shack), 4 square switching, directional switching of beverage antennas or similar, tuning of magnetic loop antennas, and rotator control for beam antennas.

Mike ZL1AXG also introduced Charlie Morris’ Simple Transceiver for 80m SSB. He showed off some of the modules that are under construction, and outlined in a block diagram the design of the transceiver. He demonstrated how the audio modules could be tested using a multi-meter, signal generator and oscilloscope by inputing a signal from the signal generator at 1KHz in the front end of an amplifier and measuring the voltage on the oscilloscope or multimeter at the output end.