[Paul F. and Chris M.]

Today we modified the coil driver for the MC2 M2 stage per ECR E1200931 and described in Jeff Kissel's L1200226.  The serial number of the triple acquisition driver is S1100023.  This gives the middle stage of MC2 a factor of 10 boost in range at low frequencies which is needed for long term (> 5 mins) locking of the input mode cleaner.  

Attached is a picture showing the shorts added to channel 1 between resistors R11 & R27 and R10 &R21.  Also attached is a before and after transfer fucntion of each channel measured in the acquisition state.