... Dewar temperatures . ... xxjul14:polB amp (in the dewar) sband hi, was replaced by a new chalmers amp.This is polA on the outside. 01aug13: first stage of amps (both pols) burned up.. had an sband experiment. ao19 was installed. may receivers taken down. ... 08sep11: sbn,alfa calibration runs after alfa installed. mar03: sband gain calibration mar03 to feb04. (gain curves.) . mar03: system performance for the data set used to make the gain curve. sep01: sband gain calibration. (gain curves.) . ...