Credit for the antenna design goes to G0KSC http://www.g0ksc.co.uk/7el-144mhz-ln-lfa.html. Sometime ago I built a 144MHz antenna but it proved to be ineffective. After a lot of research I decided to build a LFA.
6 x 3/8″ Stauff mounts
3 x 1/2″ Stauff mounts
6meters of 3/8″ aluminum tube
2meters of 1/2″ aluminum tube
3meters of 25.4 RHS tube (from Bunnings)
100mm x 160mm x 6mm aluminum (mounting plate)
Tube bender (ebay)
Pipe cutting tool
Right angle aluminum
Finding some of the parts was somewhat of a challenge. I bought the aluminum from NBS Antennas as they were able to supply 1/2″ and 3/8″ tube. Their tube 3/8″ fits nicely into the 1/2″ tube.
Mounting the aluminum onto the boom was another challenge too. You could order mounts from G0KSC like I did and get the wrong mounts. No point sending them back either. I managed to find a place in Canberra that supplies the Stauff mounts. These mounts are used for hydraulic oil lines.
I used the dimensions as per http://www.g0ksc.co.uk/7el-144mhz-ln-lfa.html for the directors and the reflector. The driven elements were another matter.