Previous experiments at the Large Plasma Device (LAPD) at UCLA provide evidence that whistler waves incident on a field-aligned density striation will produce lower hybrid waves via a linear mode-coupling mechanism [Bamber, et al., 1994; Bamber, et al., 1995>. These experiments were limited in that only the magnetic fields of the waves were measured. Recent experiments at the LAPD directly measure the whistler and lower hybrid wave electric fields. The lower hybrid wave electric field amplitude is 0.8 times the incident electric field. These measurements are well within theory and allow us to make some estimates about the conversion efficiency of the linear conversion mechanism. ¿ 1998 American Geophysical Union