1296MHZ - GM

Scottish 23cm Activity

OH2AUE Dipole Mat - Dimensions

From: Michael Fletcher <[email protected]>
Subject: Re: 1296MHz dipole mat

Hi David,

Apologies for the delay in my response, but I have been pretty busy before my summer hols.

I just jotted down some dimensions of the dipole mat for 1296.

• The reflectors are 3 mm aluminium welding wire and are all 110 mm long.
• The radiators are 2 mm brass welding wire and 100 mm long.
• The spacing between reflector and radiator is 45 mm.
• Standoffs are made of RG213 insulator.
• Total height of the five element (between radiators) antenna is 460 mm and the spacing between the two vertical supports is 125 mm.
• Spacing of the radiators is 115 mm.
• The feed is symmetrical and needs a balun that I have made from PTFE coax (UT-141) as also the feedline itself.
• The phasing lines are 1.6 mm copper wire and just long enough to allow about 10 mm between each other as they crossover for phasing.
• The antenna is scalable in any direction for more gain (you could also add directors too...).

  During my holiday I will try to find the time to make a real drawing of the thing along with some other updates for my www pages.

  Hope this helps.

  Michael, OH2AUE

  www.oh2aue.pp.fi