Here is a summary of the repairs to BTOW during September and October of 2009.

1) Examine 4 sources of data to find problems:

    a) PMT HV control program (masked channels)

    b) Mathhew Walker: 2009 slope data

    c) Matthew Walker: 2009 MIP data

    d) 2009 LED data (about 2/3 of channels operating)

2) Made list of channels which had

    a) Masked during run in PMT HV program

    b) Have no mip/slope.  If channel has LED, also eliminated from list of problem channels

    c) Not in inaccessible PMT boxes: 9, 16, 23, 39, 46, 53

3) Examined each channel with oscilloscope to check for signal.  Then examined PMT box connector, cable and FEE connector for problems. 

4) Total of 44 channels recovered:

SoftID    Fix

139    fixed connector on PMT box
148    fixed FEE connector
283    unmasked
334    replaced base only
629    set HV=700V
639    replaced base only
647    Set HV=700V
755    replaced base only
851    replaced base only
875    set HV=700V
975    replaced base only
1019   replaced base only
1142   replaced base only
1176   replaced base/tube
1221   replaced base only
1387   mylar blocking pins-repaired
1448   replaced base only
1654   set HV=700V
1732   replaced base/tube
1850   set HV=700V
1878   fixed FEE connector
1899   reset base number
2032   set HV=700V
2041   replace base only
2304   replace base/tube-ground problem
2401   connect signal cable
2402   connect signal cable
2403   connect signal cable
2404   connect signal cable
2633   fixed FEE connector
2652   fixed FEE connector
2727   fixed FEE connector
2969   set HV=700V
3255   unmasked-HV OK
3328   replaced base only
3372   fixed PMT box connector
3948   replaced base/tube
4217   fixed FEE connector
4432   unmasked
4534   fixed FEE connector
4595   replaced base/tube
4676   replaced base only
4682   replaced base only
4782   fixed FEE connector