The effects of radio frequency (rf) fields on charge density wave current c
onversion were studied by normal and transposed measurements. In contrast t
o the strong suppression of the de threshold fields, the suppression of pha
se slip voltages was less effective. The phase slip voltages can be even la
rger in rf fields. Oscillations with the magnitude of the rf fields were bo
th observed in threshold voltages and phase slip ones. (C) 2000 Published b
y Elsevier Science Ltd.