I am reading the 19th edition of the ARRL Antenna Book. I am unclear
which polarization to use if I want 2 Helical antennas to talk to each
other. In the book it says, ". . . when two stations use helical
antennas over a non reflective path, both must use antennas with the
same polarization sense.." I find this could be interpreted in
different ways and is not clear at all. It seems logical to me that if
both antennas had the same polarization that when they faced each other
they two helices would be in opposite directions and that would seem to
be bad. Am I right?

It says the circumference can be between 1.33 wavelengths and .75
wavelengths. From the gain formula it would seem that the 1.33 figure
would give the most gain for a given length of the antenna. Other than
mechanical considerations is there any reason I wouldn't want to use the
1.33 number?

Finally, I may have missed it, but I didn't see anything that indicated
how large of a wire or tube I should use for the helix. I am guessing
this is just a mater of how much power I plan on feeding it with?

PS I would like to build 2 of these one is for 2.4ghz wireless network
and one is 432 mhz amateur band EME and or satellite work. So the
2.4ghz version will likely never see more than 100 mW but could see as
much as 1 watt. The 432 mhz version could see as much as 1000 watts,
but if I did that it would be to an array of 4 of them so I guess each
one would only see 250 watts?

--
Chris W

Gift Giving Made Easy
Get the gifts you want &
give the gifts they want
One stop wish list for any gift,
from anywhere, for any occasion!
http://thewishzone.com