  A novel soft-photon amplitude is proposed to replace the conventional Low
soft-photon amplitude for nucleon-nucleon bremsstrahlung. Its derivation is
guided by the standard meson-exchange model of the nucleon-nucleon interaction.
This new amplitude provides a superior description of $pp\gamma$ data. The
predictions of this new amplitude are in close agreement with potential-model
calculations, which implies that, contrary to conclusions drawn by others,
off-shell effects are essentially insignificant below pion-production
threshold.
