I am about to embark on the construction of an inverted V half wave dipole. It will possibly be multi-band but, for the moment, I want to build it for 20M. Because of the shape of my property, I would like the centre pole to be as high as possible to give me the correct angle for the inverted V. I thought that I might be able to make this from sections of aluminium tubing. I even sourced a company that would supply these but I have carelessly lost the page and can't seem to get it again.
So, basically, can anybody tell me the best material to use for the centre pole and possibly how I might source it. I would also be grateful for any suggestion as to the type of wire to use for the actual antenna.