I'd like to build the antenna from the following page;

http://www.frars.org.uk/cgi-bin/rend...62&goback=1064

But there are a few details I need to sort out before I try.



1) It uses UT141, Could I sub 9913?

2) Or, should I use the copper tube method shown here,

http://martybugs.net/wireless/biquad/

3) The author states:

"Next, cut four pieces of UT141 coax 80mm long, and strip 1.5mm of outer
from each end, leaving a total outside length of 77mm. These will form part
of the phasing assembly. Follow the diagram as to the connection of these
pieces of coax. Connection of two double quads in parallel will result in an
impedance of 25 ohms."



Please view 4double quad back jpg at bottom of page as reference.



I assume he's describing the 77mm pieces that run at a 45* angles, however
the picture does not show

UT141 coax as he describes.



4) Again the author states:

" Next for the 25ohm to 100 ohm matching sections, cut two pieces of 61mm
UT141, again strip the outer back 1.5mm from each end to leave a outside
length of 58mm. Of course 2 100 ohm coax's in parallel will result in an
impedance of 50 ohms. Connect each piece to the joined 77mm lengths as per
the diagram. Under the connector, both centre conductors from the 58mm
lengths are connected to the centre pin of the SMA socket. Solder the outer
of these lengths to the SMA socket body to ensure a good earth connection."



Again he says use UT141 but I don't see it in the picture.



I'm looking forward to your input!

Thanks, Mike