  We examine an unusual phenomenon where, in tilted magnetic fields near magic
angles parallel to crystallographic planes, a "giant" resonant Nernst signal
has been observed by Wu et al.[Phys. Rev. Lett. 91 56601(2003)] in the metallic
state of an organic conducting Bechgaard salt. We show that this effect appears
to be a general feature of these materials, and is also present in the field
induced spin density wave phase with even larger amplitude. Our results place
new restrictions on models that treat the metallic state as an unconventional
density wave or as a state with finite Cooper pairing.
