This site can be edited by multiple authors and may contain errors. No liability can be acepted for using it. Electrical and mechanical devices and components are potentially dangerous, so take suitable precautions such as wearing safety goggles where appropriate. All content is provided on a "share and share alike" basis. If you are not happy with this please do not use the site or copy anything from it.
Site created and administered by Richard J Bowers (trading as Nomaz)