Raising the public profile of Amateur Radio

The Midland Amateur Radio Club, in their ongoing efforts to raise the public profile of amateur radio in Australia, will be staging an event with a difference on 25 May 2013.

Kevin Crockett, VK3CKC, will take to the Axedale end of the O’Keefe Rail Trail which forms part of the old Heathcote Junction to Bendigo rail line. A radio-equipped, recumbent tadpole trike has been purpose-built for the event.

The Club callsign VK3CMZ, will also have an operating amateur station set up at the Axedale Market next to the hall where the public can listen in on 40m HF contacts around 7.090MHz being made. They will be able to directly communicate with the trike itself on 2m via the local VK3RCV repeater as the trike makes its way towards the town accompanied by children from the Axedale Primary School.

Automatic Packet Reporting System, or APRS, will be used to display progress on a laptop computer at a display stand at the Market.

Those who can’t attend should be able to follow the trike via www.aprs.fi/. An offer for Internet streaming communications audio via http://www.vk3cmz.com has also been received.

The City of Greater Bendigo is currently extending the Rail Trail to

Heathcote and this event is something of a shakedown for a larger event later in the year that will cover from Bendigo to Axedale or even beyond if any of the extension is ready by then. It may even be repeated for the WIA National Field Day next year.

The event has attracted proud support from the City of Greater Bendigo Eppalock Ward Councillors, Friends of the Bendigo-Kilmore Rail Trail, Axedale Primary School, Axedale Our Town Our Future Committee and Axedale Public Hall Committee.

Isle of Man special callsign

The Isle of Man Amateur Radio Society will be QRV on HF bands using a very special callsign on Sunday 2 June 2013.

GB4JDF has been issued on behalf of the Joey Dunlop Foundation, an IOM Charity set up to cater for injured riders.

Named after 26 times TT Winner Joey Dunlop, the Foundation is getting together with IOMARS members to host the station on "Mad Sunday" on the Isle of Man. The station will be on air from around 9am until midnight, and celebrity riders may be on air from time to time to pass greetings messages.

Joey Dunlop died tragically in a motorcycle accident, but his name lives on, and his record of 26 TT wins has yet to be equalled or beaten.

More information - http://www.joeydunlopfoundation.com

SSB using a Raspberry Pi

Guido PE1NNZ has released code to enable the Raspberry Pi computer board to generate SSB on the 7 and 14 MHz bands.

“The following code can generate SSB modulation just by controlling a PLL carrier. I have applied this method on the RapsberryPi PLL, and made several contacts on 40m and 20m band with my RaspberryPi.” comments Guido

“The RaspberryPi receives the Microphone input via an external USB sound device. To improve the SSB quality, the signal is companded by a A-law compression technique. Three parallel BS170 MOSFETs where directly driven by RaspberryPi GPIO4 output to create about 1Watt of RF.”

“On 40m I could made several SSB contacts through Europe using this setup, receiving stations back by using a nearby online WebSDR receiver.”

Direct SSB generation by frequency modulating a PLL - http://pe1nnz.nl.eu.org/2013/05/direct-ssb-generation-on-pll.html