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The Observer's Guide
The guide contains information on:
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Parts and equipment condition checklist for checking-out
and returning the PST
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PST Carrying Case
The PST case contains:
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PST
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12mm eyepiece
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RA and DEC slow-motion attachments
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Clock drive
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Tripod accessory tray
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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:
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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.
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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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