I Built this antenna for NOAA weather APT satellites. At the time of making this there are 3 in orbit; NOAA 15, NOAA 18, & NOAA 19. It didn't turn out, looks wise, as well as others I had seen online but when I checked the SWR it was dead on 1:1 at 137.000MHz. At the time I was very new to WX satellite reception. So I installed it on my tower at about 45ft and waited for the first flyby on a NOAA satellite, the results were not good! So I took it back down and stored it away not giving it much thought. I lost a bit of interest in it for while but when I did want to try and receive an image I would just use my 2m/440 omni atop my tower, which out it worked much better than the QFH antenna. Well after about year and half I got the antenna back out and studied over it again. Come to find out at the top where the coax connects to each leg there was a short, didn't notice that before, don't know if that was even the issue with it the first time. So I have fixed that issue and have read up some more on these types of antennas. Now I think I have it ready, I'm just waiting to put it back up. This time a plan on leaving it up for a while and not giving up on the first bad pass. If you check out my weather satellite page, all those pictures are received using my 2m/44 omni.
Making the antenna wasn't to bad, it would have been easier it I had the right parts. I'm not going to explain have to make one, just google search for it. I used 3/8" copper pipe but I didnt have any 3/8" 90deg elbows. So I used the next size up and just used a lot of solder to fill in the gaps to make the connection. It took a friend and I about 2 hours to make it. Below is the link to the online calculator I used to build mine also a few pictures of the construction process.
{gallery}QFH_Antenna{/gallery}