The AHARS Technical Seminar was held at the Belair Community Hall on Sunday 19 September 2010. Before the door opened there was a queue of people waiting to come in. All together, 85 people attended (including four students from one of the TAFE colleges). All found something of particular interest.
The lunch and morning and afternoon teas were pronounced to be excellent and more than ample.
The lectures ranged from two by Drew Diamond VK3XU in which he spoke of some of the items that have appeared in AR from time to time and others that had not. The demonstration items he brought along were very good.
Phil Harman explained very clearly the principle of High Performance Software Defined Radio (HPSDR) and his talk was backed up by the working station set up by Hans Smit VK5YX.
Rob Gurr VK5RG gave a talk about early SSB when the amateurs were experimenting with this new medium and were building their own phase modulated equipment because there was no commercial manufacturer prepared to make radios that may represent just a passing phase - no pun intended.
Keith Gooley VK5OQ and lain Crawford VK5ZD demonstrated different systems used for transmitting and receiving on UHF and SHF. Several large dishes were assembled to be examined and some very small components (designed to operate on very short wavelengths) such as wave guides and mixers were passed
around to be studied.
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