I was wondering about shortening my diy replaced antenna. I got my T-Maxx with radio problems and found the ant. was to short and the wire was broken inside the insulation so I googled 27mhz antenna and found 27 inches was about right. I soldered 27 inches of wire I had lying around to the reciver board and it fixed it. With the wire doubled over (see pics in my gallery) and full batteries I can drive out till my trucks a little speck on the horizon. I was kinda into shortwave radio and such and someone told me with radio signals the antenna should be a fraction (takes less space) or a multiple (better reception) of the given frequencies wavelength. 27 inches for 27mhz is 1:1 I guess. Try googleing your frequency to the Mhz and the word "antenna".