hi members

i wanted to do FPV for a long time.. as struggling with the range with stock 2.4 transmitters. i read on the forums that modifying the antenna with 1/2 wavelength gives a better range than the stock 1/4 wavelength . i started doing modification to my corona reciever. . i will obtain the RSSI output to channel 8 and then i will measure the signal strength with a E OSD from hobbyking connected to my FY ap117. ( ap117 does not support rssi feed).
here are some links where i got the info from. let me know if any one tried it.

http://www.rc-cam.com/ant_exp.htm

http://www.rcgroups.com/forums/showthread.php?t=1370485

http://www.team-blacksheep.com/article/page:20

regards
sujith