George was the PI, and the DMR as built is eerily reminiscent of the LBL design proposed in 1974. Of course Dave Wilkinson's correlation radiometer alternative would have been less sensitive to the Earth's magnetic field than Smoot's ferrite Dicke switch. But by August 1991 the COBE team had corrected the magnetic systematic error and I was able to tell George he had a signal. This is part of my history of CMB observations. My October 1991 draft paper described both the detection and a bit of the interpretation of the DMR results. --Ned Wright, UCLA