Profile: Wallen Antennae Ltd specializes in designing and manufacturing antenna systems. Our voltage convertors are available in isolated versions for use on isolated-return vehicles, such as petro-chemical tankers. It will operate over a wider input voltage range and at a lower cranking voltage than rival designs. Different versions are available to support a wide range of applications, typically in vehicles (and particularly for a growing variety of mobile communications). Non-isolated versions are supplied with the extra protection of soft-shutdown. PA018 & PA019 paging antenna's are small, low wind resistance units which can be used for a wide range of applications. This is of rugged construction, they are manufactured to operate at the specific frequencies listed, but versions can be supplied for frequencies between 27 and 54MHz if specified at the time of ordering. They have sub-unity dB gain and are fitted with SO239 sockets.