Alan wrote:

One other thing the OP should be made aware of is cable quality
http://www.wrightsaerials.tv/articles/coax-cable-quality.shtml
Example (but not possibly the best of prices)
http://www.tlc-direct.co.uk/Products/CAPF100W.html
And some idea about fitting a F connector
http://www.satcure.co.uk/tech/fconn.htm

Thanks, that's helpful