AHARS  SYMPOSIUM - details.
Drew Diamond, VK3XU

 Drew will talk on his LF (136 kHz) and MF (507 kHz) work.
He intends to show the 100 Watt transmitters, loading coils, 136 kHz receiving loop, and discuss some of the practicalities of radiating a signal, and hearing signals.

 1. Low Frequency (LF) and Medium Frequency (MF) Development.

 

 (1). "Paddyboard" construction is one of his favourite circuit-boarding methods.
He'll  address this topic,  with photos, and a practical demo.

 (2). He'll also demonstrate simple radio/electronics metal-work using home-workshop type tools.

 

2.  Innovative Home Brew techniques
 

From AR magazine, April 2010.
 

Drew has written many technical articles for "AR" Magazine, and also produced some fine books.

He'll have some of  these for sale at the Symposium.
There are plenty of useful and practical projects to be found in these books.

 

3. Articles, Projects and Books
Phil  Hartman, VK6APH
Like Drew, Phil was a keynote speaker at the 2010 WIA AGM.

Phil is amongst the leaders in the world of HPSDR, working with Steve Ireland, VK6VZ and others over the past 4 years developing the project.
 
He has written many articles on the subject in Radcom, the RSGB magazine, and made presentations at various conferences, including the  Digital Communication Conference, in Chicago, IL, USA, Phil, in 2008.

The "stunning" real-world performance (of HPSDR) ...is...  being achieved by the "open hardware" coupled with ...the... free open source software (FOSS) approach of the Tucson Amateur Packet Radio (TAPR) organisation.  (From the WIA website).

 

HPSDR
(High Performance Software Defined Radio).

 

KEITH GOOLEY VK5OQ and Iain Crawford, VK5ZD


DIY is possible with a little equipment and dedication.

 

 Microwave Equipment Construction.

Rob Gurr, VK5RG


How they did it in the early days, when SSB was frowned upon.

 

 Early SSB Techniques.
Graham Dicker, VK5ZFZ


Not much point in making something that works but doesn't look worth being proud of! It also increases its value and impresses your friends!
 


Front panel finishing

 
DEMONSTRATIONS

Hans Smit, VK5YX
Hans is one of several VK5's making use of this wonderful avenue in radio communications.
 

Working HPSDR setup.

 

Jim Tregellas, VK5TR
Jim has found cheaper and simpler ways to do useful measurements of those difficult parameters that most of us wouldn't even consider trying.

Vector network analyser with loop antenna, crystal filter and crystals to analyse.

 

Barry Williams, VK5BW
AHARS member Barry somehow manages - amongst his other work in the electronics industry, to build such challenging devices.

Home Brew Linear Amplifier

 

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This page last updated 17/09/2010