Join Date: Apr 2003
Location: Putnam, CT, USA
I simply cut mine in half and put the end cap back on. The antenna length is tuned for a specific frequency, (which is a compromise since the AM and FM bands span multiple frequencies), but you can still get good results with a shorter antenna (which is therefore tuned to a higher frequency). In rural CT, my radio reception with my 1/2 length antenna is no worse then it was with the stock antenna, which means, it still sucks!
A simple FM dipole antenna for an FM transmitter (or receiver) system has it's length determined by:
The wavelength, l, of the frequency you wish to tune to (say the middle of the FM band, (108 - 87.5)/2 + 87.5 = 97.75 Mhz, by dividing the speed of light (11,784,960,000 in/sec) by the frequency (97,750,000 cycles/sec) = 120.5. Thats for a full dipole, most antennas are 1/4 dipole, or in this case about 30 in. I think the stock LT antenna is about 36 in.
'07 - R1200RT Slippery Silver
'03 R1150RT - MAXed out
'03 K1200LTC - Gone to the Darko side
'00 Kawasaki Concours - Buzz
'71 Honda SL350 - The original dual-sport
'72 Kawasaki 250 triple - The smoking gun
'67 Montgomery Wards 125 - Thrashed to death