During the original construction of the
telescope there were:
Auxiliary cables were added to the telescope during the gregorian
upgrade (1992-1996). twelve cables in all were added:
date |
location |
jpeg |
Notes |
140113 |
6.4 mag earthquake |
T8PM1 (north) spliced main cable damaged |
|
170920 |
Hurricane
Maria |
||
190218 |
Tower12 on tower |
tower to platform |
|
T12PAux1(east) |
.jpg |
close up with finger. the missing paint
matches 200127 t12PAux1 photo. |
|
190218 |
Tower4 on tower |
tower to platform | |
T4PAux2(north) |
.mp4 |
mpeg movie moving around the cable socket. |
|
T4PAux2(north) |
.jpg |
close up with tape. largest slippage |
|
.jpg |
close up with tape. other side of cable |
||
190218 |
Tower8 on tower |
cables to platform | |
T8PAux1(north) |
.jpg |
close up socket. This photo did not say
which socket on twr 8 it was. From the angle i'm assuming it is auxNorth to platform It could possibly be AuxSouth to anchor. |
|
200107 |
6.4 mag earthquake |
quakes continued for awhile |
|
200127 |
Tower12 on tower |
tower to platform and tower to anchor |
|
T12PAux1(east) |
.jpg |
to platform .closeup with micrometer
measurement |
|
.jpg |
to platform. shot of socket, pin, bethlehem
id numbers. |
||
T12PAux2(west) |
.jpg |
to platform. closeup with micrometer measurement | |
.jpg |
to platform. shot of socket, pin, bethlehem id numbers. | ||
T12BAux1(east) |
.jpg |
to anchor. closeup with micrometer measurement | |
.jpg |
to anchor. closeup without micrometer |
||
T12BAux2(west) |
.jpg |
to anchor. closeup with micrometer measurement | |
.jpg |
to anchor. closeup without micrometer | ||
T12CwT |
.jpg |
catwalk cable from Tower 12 to platform |
|
200810 |
T4PAux2(north) fails |
||
200813 |
Tower 4 drone at tower |
||
main and aux cables |
.jpg |
shows popped strands on T4PMain1(south) This is also seen popped on 200812. T4PMain4 has not yet popped. |
|
200814 |
Tower 4 on tower |
||
T4BAux1(south) |
.jpg |
to anchor. close up of cable in socket. |
|
200916 |
T4PMain4(north) |
popped strands. |
|
.jpg |
looks like 2 strands popped. It was ok on
200914. |
||
.jpg |
200921:another view of the broken strands |
||
200817 |
T12PMain1(east) |
.jpg |
At platform connection. Shows popped strand
on T12PMain1(east). |
200827 |
Tower 8 at platform |
2 popped strands |
|
T8Pmain1 at platform |
.jpg |
shows two popped strands. this is the cable
that has been spliced We don't have any pictures prior to this to see when these strands popped. After talking with maintenance, these popped strands have been there for years., |
|
.jpg |
a better shot on 200911 of the popped strands |
||
200903 | Tower12 at anchor | |
|
|
T12BAux1 (east) | .jpg | close up with tape |
T12BAux2 (west) |
.jpg |
closeup. tape show slippage of 1 13/16" |
|
.jpg |
farther away showing window and tape |
||
.jpg |
farther back showing cable, socket, and air
injection. |
||
200915 |
Tower 4 at anchor |
cables anchor to tower. | |
T4 anchor |
.jpg |
looking toward the T4 anchor. t main cables
in the middle right aux cable is south, left aux cable is north |
|
T4BAux1 (south) |
.jpg |
Looking down aux cable from front of original
anchor to cable socket |
|
.jpg |
closeup with tape. |
||
.jpg |
shot from the side without the tape |
||
T4BMain1 (south) |
.jpg |
backstay main cable #1 (south most) |
|
T4BMain2 |
.jpg |
backstay main cable #2 | |
T4BMain3 | .jpg |
backstay main cable #3. I didn't do a good
job of centering it.:) |
|
T4BMain4 | .jpg |
backstay main cable #4 | |
T4BMain5 | .jpg |
backstay main cable #5 (north most) |
|
T4BAux2 (north) |
.jpg |
Looking down cable from front of original
anchor to cable socket |
|
.jpg |
closeup with tape. | ||
.jpg |
shot from the side without the tape |
||
.jpg |
same as above with camera rotated 90deg |
||
200923 24 |
T4 AuxNorth
failed socket on the ground |
looking into the failed socket. The front opening is 4" (the cable is 3 1/4") Looking from the back side it measures about 8" (where the zinc ends) |
|
.jpg |
socket sitting on table. the long bar was
used to pull the pin from the socket. |
||
looking into failed socket |
.jpg0
.jpg1
.jpg2
.jpg3
.jpg4
.jpg5
.jpg6
.jpg7
.jpg8 |
||
200924 |
T4 at platform |
repainted cables with popped strands. |
|
T4PAux1 (south) |
.jpg .jpg |
with tape. after repainting. pictures may have been a few days later. |
|
200924 |
T12 at platform |
pictures may have been taken a few days
later. |
|
T12PAux1 (East) |
.jpg .jpg |
platform side with micrometer and tape |
|
T12PAux2 (West) |
.jpg .jpg |
platform side with tape |
|
T12BAux1 (East) |
.jpg |
backstay side. with tape |
|
T12BAux2 (West) |
.jpg .jpg |
backstay side with tape. |
|
200924 |
T12 at anchor |
main backstay cables |
|
T12BMain1(east) |
.jpg |
may want to reshoot 1-3 (need a ladder to
reach them better) |
|
T12BMain2 | .jpg | ||
T12BMain3 | .jpg | ||
T12BMain4 | .jpg | ||
T12BMain5(west) | .jpg | ||
200927 |
4.1
mag earthquake |
||
200928 |
T4 at anchor |
||
T4BAux1 (south) | .jpg |
close up with tape measure. may have moved a
little since 200915 picture. |
|
.jpg |
shot from side opposite the tape measure |
||
T4BAux2 (north) |
.jpg |
close up with tape measure. |
|
.jpg |
shot from side opposite the tape measure. |
||
200928 | T8 at anchor | ||
|
T8BAux1(north) |
.jpg |
close up with tape |
.jpg |
shot from side opposite the tape |
||
|
T8BMain1(north) |
.jpg |
looking at west side of cable |
.jpg | looking at east side of cable. some strands
with corrosion. |
||
T8BMain2 |
.jpg | looking at west side of cable | |
.jpg | looking at east side of cable | ||
T8BMain3 |
.jpg | looking at west side of cable | |
.jpg | looking at east side of cable | ||
T8BMain4 |
.jpg | looking at west side of cable | |
.jpg | looking at east side of cable | ||
T8BMain5(south) |
.jpg | looking at west side of cable | |
.jpg | looking at east side of cable | ||
T8BAux2(south) |
.jpg |
close up with tape |
|
.jpg |
shot from side opposite the tape |
||
201015 |
T4 on tower |
new popped strand on T4PMain3 |
|
T4PMain3 |
.jpg .prev |
-shows popped strand on T4PMain3. -201014 (previous day) shows no popped strand. |
|
201016 |
T4 on
tower |
popped strand on T4PMain1. Not present 15oct.
present 16oct looking back at 13aug20you see it had previously popped |
|
T4PMain1(south) |
.jpg .jpg .prev 13oct |
- shows popped strand on T4PMain1 (south) - ditto - 201015 (previous day) shows same cable with no popped strand - 200813 show that the strand had popped back then |
|
.jpg .prev |
- top view. cable on far side is
T4PMain1(south) - top view from previous day with no popped strands |
||
date |
location |
jpeg |
Notes |
t4PAux4N hanging on T12PAux1E |
|||
200814 |
.jpg | shows the failed cable hanging from
T12PAux1E. drone shot from the top |
|
200820 |
.jpg |
drone shot from the side. |
|
200821 |
.jpg |
||
200823 |
.jpg |
||
200827 |
.jpg |
||
200901 |
.jpg1 .jpg2 .jpg3 |
||
200908 |
.jpg |
||
200821 |
drone in action |
.jpg |
|
Rubbing plate arcing T4PAux1S,T8PAux2S |
from hf? |
||
200826 |
.jpg |
||
200827 |
.jpg |
||
200910 |
.jpg | ||
200831 |
Td12 cable rubbing T12PMain1(east) |
.jpg1 .jpg2 .jpg3 |
|
201013 |
open cable showing strands |
.jpg .jpg |
3.25 diameter cable at visitor center showing
strands. there are 9 rings with a total of 217 wires. By ring the wire count is:
The cable diameter is 3.25 inches. Need to check which diameter cable this is. |
201117 |
Nut on T4 platform pin |
.jpg .jpg .jpg .jpg |
south facing side (next to broken cable) |
.jpg .jpg .jpg .jpg |
North facing side |