Thanks.
Unlike my first doodle this pattern was derived mainly with reference to
https://esc.gsfc.nasa.gov/sites/defa...SAC%20Stow.jpg
https://esc.gsfc.nasa.gov/sites/defa...be%20table.jpg
https://esc.gsfc.nasa.gov/sites/defa...eployments.jpg
http://esc.gsfc.nasa.gov/sites/defau...age%20Tent.jpg
from
https://esc.gsfc.nasa.gov/index.php/...l&name=&page=3
whch show the TRDRS-M.
Although looking again at those images and a couple of others I think that the radial elements in
http://www.papermodelers.com/forum/a...e-tdrs-ant.pdf
should be be reduced to the same width as that of the spiral elements.
Having put together a quick sample I certainly agree that at 1/25 three conical sections would definitely give a better representation than one.
But how would they be assembled in the absence of thickness or supporting structure? A jig perhaps?