When you receive the Loftenna you will receive two components: (1) the antenna and (2) the unun and counterpoise unit.
Identify the ends of the aerial: there is the unun end and the "other end". The unun end is where you will feed the antenna so place that near where your coax comes into the loft space. Fasten the support strings and place the aerial so that the unun is at the bottom. Then stretch out the aerial and fasten the "other end" to another hook or screw using the supplied loops. There MUST be NO TWISTS in the wires.
The unun is fastened to one end of the antenna and this device goes at the BOTTOM...it is used to cause the aerial to hang correctly. (Photos to follow).
THE ANTENNA WIRES CAN BE HORIZONTAL OR ONE ABOVE THE OTHER, JUST SO LONG AS THEY ARENT CROSSED AND TWISTED.
Your unun might be yellow like the picture or a simple black box unit. The contents are the same!
Pull the support cord tight but not bar tight! The wires of the aerial are the important part and they should be 'pretty tight', that is not sagging on the floor!
Feed the unun with coax to the rig.
- The unun case is damp proof not waterproof - hang it outdoors by all means, but maybe tape it or shelter it from the worst of the weather!
- According to the RSGB calculator you will need 4.7m of free space for the latest OfCom EMF regs but I think it might be less. If it's in your loft though I imagine it is automatically compliant as it's likely to be 4.7m high!!