2013-05-10 13:39:31 jaclyn.sanders@LIGO.ORG
    05/10/2013 - LHO - Modify (N.A.)
        05/10/2013 Jaclyn Sanders Modification Description
            Modification as per E1200907. R271 to 0 ohms, R272 to NL.

2018-11-12 11:53:33 marc.pirello@LIGO.ORG
    11/12/2018 - LHO - Modify (EE Lab)
        11/12/2018 Marc Pirello Modification Description
            Modification as per E1800338
            
            Change the first 2 boost stages to 10/500Hz.
            C118 -> 1 µF
            R72 -> 15 k?
            R77 -> 332 ?
            C119 -> 1 µF
            R74 -> 15 k?
            R78 -> 332 ?
            
            Add two ~15 kHz low pass to the error signal DAQ readback.
            C78 -> 1 nF
            C79 -> 3.3 nF
            
            Add a 500 Hz low pass to the slow DAQ readback.
            C243 -> 10 nF
            
            Add a 15 kHz low pass to the fast DAQ readback.
            C295 -> 330 pF