.
Ran every head through EC100 number 1817 using ECMon. Found the following:
| Type | S/N | Testing comments |
| CSAT3AW | 2033 | good |
| 2034 | good | |
| 2035 | good | |
| 2036 | good | |
| 2037 | good | |
| 2043 | good | |
| 2044 | good | |
| 2045 | good | |
| 2046 | good | |
| 2047 | good | |
| 2048 | good | |
| 2049 | good (despite Gordon's note saying head was bad with "flags 1,4,5 set") | |
| 2050 | intermittent error flag | |
| 2051 | Head reports "NOCAL"; Tc high by 4 degrees C | |
| CSAT3A/EC150 | 1244 | good |
| 1311 | good | |
| 1312 | At VERTEX | |
| CSAT3AW/EC150 | 1004 | continuous "low amplitude", "signal lock" flags set (red LED); intermittent "delta T" flag set |
| 1007 | continuous "low amplitude", "signal lock" flags set (red LED); intermittent "delta T" flag set | |
| 1001 | continuous "low amplitude", "signal lock" flags set (red LED); intermittent "delta T" flag set | |
| 1002 | continuous "low amplitude", "signal lock" flags set (red LED); intermittent "delta T" flag set | |
| 1010 | continuous "low amplitude", "signal lock" flags set (red LED); intermittent "delta T" flag set | |
| 1008 | continuous "low amplitude", "signal lock" flags set (red LED); intermittent "delta T" flag set | |
| 1009 | continuous "low amplitude", "signal lock" flags set (red LED); intermittent "delta T" flag set | |
| 1005 | continuous "low amplitude", "signal lock" flags set (red LED); intermittent "delta T" flag set | |
| 1003 | continuous "low amplitude", "signal lock" flags set (red LED); intermittent "delta T" flag set | |
| 1006 | continuous "low amplitude", "signal lock" flags set (red LED); intermittent "delta T" flag set | |
| 2031 | good | |
| 2032 | good |
I have a call in to Campbell. I'm hoping that going back a rev (from 100.07) on EC100 firmware will fix 1001–1010. Heads 2050/2051 may have to be sent back .