Newsletter Archive

E-News Issue #9

20 May 1998

World Scene

On the world market, PV module shipments have doubled in only four years from 61 MW in 1993 to 122 MW in 1997. It would be nice if our retail domestic market had done the same thing instead of contracting!

Safety

A recent article I read in 'What's new in Radio Communications' gave me some further insight into the potential dangers of electric shock from extra low voltages. A current of 10 mA can cause muscular paralysis so the victim can't release his/her grip. At 30 mA paralysis of the respiratory system can occur; while 75-250 mA can cause ventricular fibrillation of the heart for exposure exceeding 5 seconds. A higher current is usually fatal. The reason for this danger is due to the skin resistance from hand to hand which is about 1000 ohm under dry conditions. A 30V potential across 1000 ohm will cause a 30 mA current flow. Under wet conditions or if the skin is cut, the hazardous voltage is cut to as little as 15V.

Feedback

John from Australia wonders if anyone has any experience designing or using Darrius Wind Turbines.

Idris from the Solomon Islands is pleased with the performance of his 12V Panasonic CD Player which includes a remote control. His Canon B340 bubble jet FAX machine uses very little power and acts as a copier, printer, fax and answering machine. It doesn't make the coffee though! Lastly, he reckons the 14 inch Philips TV has the best sound of all the small units he has tried.

So, that's all the news this month. Send us your comments, questions, feedback and don't forget the orders!

Cheers from Dave and all the RPC crew.

Dave Lambert (Director)

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We install solar systems in Northern NSW and Southern QLD.


QLD:
Gold Coast (from Coolangatta to Southport), Nerang and Hinterland (Beaudesert) and out West (Warwick, Stanthorpe, Killarney)


NSW:
Northern NSW (Tweed Heads to Yamba, including Evans Head, Byron Bay and Ballina); the Far North Coast Hinterland (Grafton via Lismore to Murwillumbah) and out West (Casino to Tenterfield, including Drake and Tabulam, as well as Woodenbong and Bonalbo)

For larger system we also go up to Brisbane or down to Coffs Harbour and even Glen Innes. Other places by arrangement.