L2 Transponder Antenna

Designed for use with transponders.

The L2 is configured to allow the coax cable to be routed flat along the mounting surface of the airframe. This antenna model would be appropriate for a composite aircraft where the antenna would be mounted in the fuselage or fin and the coax would be close to the skin and be attached periodically for strain relief. In either case, the antenna can be used as a retrofit on in service aircraft or in new installations.

Installation Information
This antenna is ideal for use in the vertical fin of a fiberglass sailplane or in the fuselage of a wood or steel tube and fabric glider.  Note that they are designed to be oriented vertically (standing up) - not horizontally (laying down).  Modern carbon fiber sailplanes are designed to accommodate antennas in the vertical fin.  The fin is specifically built using fiberglass rather than carbon fiber for that reason.  They also work great in restorations of antique and classic aircraft when you don't want an exposed whip antenna.  These antennas will not work in metal aircraft.

Fabric airframes can use this antenna in either the fuselage or the wing. Silver dope is not a problem with this antenna, however, attention must be given to the attachment of the antenna to the airframe to optimize performance. In a wing installation, attachment to a wooden rib or wooden spar is a must. In the fuselage, behind the seats in the tail cone is best. Here it is best to keep the antenna away from the metal structure.