In roads towards specification are being made in a number of places ;
Some specification resources ;
http://www.siamwaterflame.co.uk/ ; supply two sizes of Oxyhydrogen Gas welding equipment ( suitable for prototype construction ) . However , @ ~ £ 3,000 ea. this is currently beyond budget .
http://www.maplin.co.uk/ ; home electronics for ( full frequency / amplitude adjustable ) PWM cicuitry are under construction ( still subject to circuit break / short circuit testing and output performance ...
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