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First test observations have been done at 230 GHz with the new dual-frequency receiver installed on Antenna 4. Receiver temperature is about 70--80 K at 1.3 mm, and first pointing showed an offset of the 1.3 mm receiver by (-4,+8) arcseconds from the 3 mm receiver. No further attempt to align the receiver has been made, but the receiver has been used for a first VLBI experiment at 1.3mm (page gif).

Robert Lucas
Thu Mar 9 12:42:24 MET 1995