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The
Observer's Guide
The guide contains information on:
- Parts and equipment condition
checklist for checking-out
and returning the PST
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PST Carrying
Case
The PST case contains:
- PST
- 12mm eyepiece
- RA and DEC slow-motion
attachments
- Clock drive
- Tripod accessory tray
- Tools: Screw driver,
Allen
wrench, Multi-purpose
wrench, and Declination axis wrench
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Tripod,
Mount,
and
Counter-Weight
carrying case.
The RA and DEC axis locks should
be left loose
when storing.
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Tripod /
Mount Set-up
The tripod legs should be splayed
by holding any
2 of the legs with the 3rd on the ground. Gently pull the two
held
legs apart until the braces are all fully extended.
The legs can be extended in length
to a comfortable
observing height.
The tripod accessory tray can now
be attached
if desired.
This image shows the clock drive
in place.
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Counter-Weight
Attachment
Carefully thread the
counter-weight shaft into
the declination axis. Hand tighten until snug.
Polar Alignment
The polar alignment has 3
adjustments:
Set the latitude adjustment by
loosening the latitude
clamp (facing) and turning the slow-motion latitude adjustment (left)
to
you latitude. The azimuth adjustment can be use to align the RA
axis
toward north.
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Clock Drive
Warning
There are certain positions where
the clock drive
inteferes with PST. You may wish to remove the drive to allow
greater
freedom of movement. Tracking can then be done manually with
occasional
adjustments in RA.
If you do opt for the clock drive,
take care NOT
to make any manual RA adjustments while the drive is engaged.
Failure
to do so could strip the gears in the drive. Loosen the set-screw
at the flexible coupling between the drive and RA shaft before making
any
manual adjustments in RA.
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Optical
Adjustments
The PST has two optical
adjustments:
- The bright knurled knob
(behind
and below the eyepiece)
is the focus adjustment. If you find yourself hopelessly lost out
of focus using the supplied 12mm eyepiece, first turn the focuser fully
clock-wise, then about 18 "wrist turns" (not full rotations) back out
to
focus.
- The black knurled ring at the
base of the PST fine
tunes the bandpass of the Ha filter. Try adjusting this to
enhance
views of particular solar features.
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Fully
Assembled PST
With the RA and DEC adjustments
loose, swing the
PST around until it is pointed toward the Sun.
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Centering the
Image (Step 1)
After a rough positioning, note
that a shadow
is cast to the upper left of the shiny extension of the DEC adjustment
(near the center of this image).
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Centering the
Image (Step 2)
Make small adjustments in each
axis until the
shadow at the base of the shiny extension of the DEC adjustment
disappears.
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Centering the
Image (Step 3)
Finally, center the small disk of
light in the
window just in front of the eyepiece. All that's left is
to center the Sun's image in the
eyepiece.
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