  We present a 67--93.6 GHz spectral line survey of Orion-KL with the new 4 mm
Receiver on the Green Bank Telescope (GBT). The survey reaches unprecedented
depths and covers the low-frequency end of the 3 mm atmospheric window which
has been relatively unexplored previously. The entire spectral-line survey is
published electronically for general use by the astronomical community. The
calibration and performance of 4 mm Receiver on the GBT is also summarized.

Instrumentation and Methods for Astrophysics;Astrophysics of Galaxies