Uraguchi, K. Nagano, Hasegawa, K. Tanaka, Akutsu
Did several installations of some parts.
Actuator coils
Installed new three actuator coils for horizontal moves, which Uraguchi-san brought from Mitaka, as replacement of the damaged coils reported here.
| LVDT# | Act coil# | (ref) Geophone# |
| 1 | 2 | H1 |
| 2 | 4 | H2 |
| 3 | 5 | H3 |
Before doing those works, I wiped yokes of the horizontal actuators as they got dust by the peeled off kapton coats.
Geophones
Got back six geophones to the original positions: Geo H1, H2, H3, V1, V2, V3.
New connector panels
Replaced the connector panels with the newer designed ones (Fig 2-6). During the work, the LVDT#4's was cut again at the point where it was cut in the past. I repaired it with copper pipe (Fig 1). Later need to be electric isolated; the measured resistance recovered to 94.2 ohm.
