Date   

Re: Reticle illuminator fried

r1300rs
 

Well ok, I'm going to answer my own question here. Radio Shack sells the right T1 3mm LED
part Number 276-026 which will run you $1.49 for a package of two. I used some .022
solder and a fine tip to touch the new LED in place. Works great. Remember the shorter wire
on LED is the Cathode and keep in mind the reversing cable as provided by AP. You can also
easily test the LED operation with the battery pack or Ohm meter (1.5 volts).

So, I'm back in operation and will now leave the polarity cable permantly attached to the
controller jack.....


dumb question

Glenn Edens
 

what mount type should the controller be set for use with the Mach1? The only options on my GTOCP3 are 400, 600E, 900 and 1200. I have not been able to find this in the documentation for either the Mach1 or the GTO hand controller (v4.12) that came with my Mach1.

thank you,

glenn edens


Re: APM Telescope (175mm) and AP900 weight limits

tucstargzr
 

Don't overlook the benefit of the wider ring spacing provided by a
longer mounting plate, even if you stay with the ~150-160MM and the
AP900.

Tom
Tucson, AZ

--- In ap-gto@..., "r1300rs" <cardiofuse@...> wrote:

Thank you for the very useful information. I believe you are right
on point regarding the
mount. I don't think that by adding 1 more inch to my normal scope
will do much for CCD
imaging but the mount, clear skys and technique will make a
difference. Perhaps I should
stay with the 150-160mm range. I have to stay portable with my
location.


Re: New AP-1200 on homemade tripod

tucstargzr
 

Add some deep cherry stain like you have on the table behind it and
you'd be styling..

Tom

--- In ap-gto@..., "gilchriswa" <gilchris@...> wrote:

All,

My AP-1200 arrived last week! It was purchased specifically for an
observatory I'm planning to build, so I didn't order a portable
pier.
Since the observatory isn't built yet (I expected to be on the
waiting
list for a couple of years), I've made a tripod for temporary use
so I
can get familiar with the mount. I've uploaded a photo of the
homemade tripod to the files section.

http://groups.yahoo.com/group/ap-gto/files/AP-1200%2Btripod.jpg

Along with some odd pieces from my garage, I spent about $35 for
lumber and hardware. Hopefully this will do until I can get the
observatory built.

Allen G


Re: DEC Gear Play - UPDATE

Joe Mize
 

It must be the temperature. This morning about 0630 when I first checked the gear play seemed to be ~1/4" when looking at the
camera. I checked again at 1000hrs, air temp 86F outside, 82F inside the observatory, ~1/8" gear play. At 1200hrs there was
even less play with temps at 96/91F. It's gonna be a another cooker later today!

Having received no input I performed the AP proceudre to remove excess gear play. Now rocking the mount in DEC again shows no
gear play, I can't feel anything. The large gear inside the DEC Gear Box turns smoothly and freely. Driving the mount first at
my normal 600x then 1200x speeds produced no hint of binding, just the usual soft purr. I'll check again as the temps go through
the heat cycle today, and later tonight as the temps get back into the mid 70's.

Recalibrating the Mount and Guider will be required tonight. The Guider should show a difference in DEC drive rates. My last
Calibration months ago shows RA was -3.16082, while DEC -2.66756. I've always wondered why there was a difference between these
two numbers. Maybe there was gear play which I couldn't feel. When Calibrrating the Guider there was only a 1sec longer drive
time to get within a few pixels of the RA distance with Zero Backlash settings. That should have told me something, but guiding
has always been excellent after determining proper settings and Biasing techniques.

Hmmm? Maybe my mount finally broke-in...joe :)


"May You Go Among The Imperishable Stars"

Joe Mize
StarFields Observatory http://www.cav-sfo.com/
Chiefland, FL 29:24'33.4"N 82:51'37.7"W

------- Original Message -------
From : Joe Mize[mailto:jmize@...]
Sent : 8/19/2007 8:27:53 AM
To : ap-gto@...
Cc :
Subject : RE: [ap-gto] DEC Gear Play

Tracking on my AP1200 GTOCP3, Dec. 2006 model is very good with RMS
averages in the low hundreths of a pixel on my AP155EDFS & STL11K.

Last night after nearly perfectly flat lines in both RA & DEC for
over two hours I slewed to a star for focusing and back. At that
time DEC guiding was completely uncontrolable. Occillations occurred
even at Maxim's Aggressiveness of #1. RA remained nearly a straight
line but was somewhat effected.

I found nearly 1/4" movement at the camera in DEC when I moved axis.
This morning I confirmed the same condition at Park-3.

I'd like some input before I start working on removing this gear play
per documentation. Is this an example of gear play or could there be
something else going on? Should I be looking for anything specific?

One last thing, I'm in Central Florida where we've been getting
into the upper 90's the past couple weeks. Could something have
slipped?

Thkx for your help...joe :)



To UNSUBSCRIBE, or for general information on the ap-gto list
see http://groups.yahoo.com/group/ap-gto
Yahoo! Groups Links


New AP-1200 on homemade tripod

gilchriswa
 

All,

My AP-1200 arrived last week! It was purchased specifically for an
observatory I'm planning to build, so I didn't order a portable pier.
Since the observatory isn't built yet (I expected to be on the waiting
list for a couple of years), I've made a tripod for temporary use so I
can get familiar with the mount. I've uploaded a photo of the
homemade tripod to the files section.

http://groups.yahoo.com/group/ap-gto/files/AP-1200%2Btripod.jpg

Along with some odd pieces from my garage, I spent about $35 for
lumber and hardware. Hopefully this will do until I can get the
observatory built.

Allen G


New file uploaded to ap-gto

ap-gto@...
 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the ap-gto
group.

File : /AP-1200+tripod.jpg
Uploaded by : gilchriswa <gilchris@...>
Description : Homemade tripod for AP-1200

You can access this file at the URL:
http://groups.yahoo.com/group/ap-gto/files/AP-1200%2Btripod.jpg

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/help/us/groups/files

Regards,

gilchriswa <gilchris@...>


More comfortable way using the Polar Alignment Scope

Joe Zeglinski
 

Hi,

Here is a link to the Hoodman Right Angle Viewer (HRAV)

"camera brand and models compatibility" table.

I think this is an earlier list, since, there are now 5 camera view finder
adapters included, to support even more models,
rather than just the 4 when I bought mine last year .

http://www.hoodmanusa.com/Right_Angle_Viewer_Press.asp

This table is difficult to locate on the Hoodman website, since it was
placed under the Press Releases tab. Would have been nice to have it linked
right to the ad.

Please have a quick look at it, and if your camera model is not listed,
phone their free 800 number, or email. Hoodman staff is really responsive.

Joe

----- Original Message -----
From: "Joseph Zeglinski" <J.Zeglinski@...>
To: <ap-gto@...>
Sent: Saturday, August 18, 2007 4:34 PM
Subject: Re: [ap-gto] More comfortable way using the Polar Alignment Scope


Sorry,

Forgot to add the link to Barry Carter's website review of right angle
viewers, I referred to previously :
visit - http://www.barrie-tao.com:80/d70finder.html
Barry Carter has tested three right angle viewers on his website.
The Hoodman HRAV, looks identical to the Nikon DR-6 in his article:
"Nikon D70 Manual Focus Aids".
Joe




To UNSUBSCRIBE, or for general information on the ap-gto list
see http://groups.yahoo.com/group/ap-gto Yahoo! Groups Links




DEC Gear Play

Joe Mize
 

Tracking on my AP1200 GTOCP3, Dec. 2006 model is very good with RMS
averages in the low hundreths of a pixel on my AP155EDFS & STL11K.

Last night after nearly perfectly flat lines in both RA & DEC for
over two hours I slewed to a star for focusing and back. At that
time DEC guiding was completely uncontrolable. Occillations occurred
even at Maxim's Aggressiveness of #1. RA remained nearly a straight
line but was somewhat effected.

I found nearly 1/4" movement at the camera in DEC when I moved axis.
This morning I confirmed the same condition at Park-3.

I'd like some input before I start working on removing this gear play
per documentation. Is this an example of gear play or could there be
something else going on? Should I be looking for anything specific?

One last thing, I'm in Central Florida where we've been getting
into the upper 90's the past couple weeks. Could something have
slipped?

Thkx for your help...joe :)


Re: More comfortable way using the Polar Alignment Scope

Mark Squicquero
 

Great idea. I was thinking along the same lines the other night while twisting my neck to use the PAS. I hadn't thought of the RA camera adapter. I was toying with the idea of using a webcam since the computer is right there anyway.

Mark


Re: More comfortable way using the Polar Alignment Scope

Joe Zeglinski
 

Sorry,

Forgot to add the link to Barry Carter's website review of right angle
viewers, I referred to previously :
visit - http://www.barrie-tao.com:80/d70finder.html
Barry Carter has tested three right angle viewers on his website.
The Hoodman HRAV, looks identical to the Nikon DR-6 in his article:
"Nikon D70 Manual Focus Aids".
Joe


More comfortable way using the Polar Alignment Scope

Joe Zeglinski
 

Hi,

I posted this to the Losmandy group, but since it applies to AP mount
owners as well, here is a copy ...

One thought I have been toying with is putting a photographic accessory,
"right angle viewer" onto the Polar Alignment Scope. This would make polar
alignment so much more comfortable, easier on the back, save neck pains, and
scraped, wet, frozen and muddied knees in the process.

I bought a "Hoodman HRAV" (i.e. Right Angle Viewer) for my DSLR, just for
that purpose.
( http://www.hoodmanusa.com/prodinfo.asp?number=H%2DRAV )
However, I find it can also do double duty, since it would be easy to slide it
off the camera viewer lens and onto a clip (fitted) to the Polar Scope.

I gave it a rough try in the house just now, and it focuses on the reticle
quite nicely with very minimal vignetting. It has a "2.5X slide switch" that
kicks in a lens into the viewer, now the Polaris marking is still in view, but
the FOV is magnified. Of course, it swivels 360 degrees, for easy viewing from
any side, a very smooth viewing focus ring of its own, and a huge rubber
eyecup. So, this has great potential.

The nice thing about the Hoodman camera eyepiece viewer is that at US$130,
it is half the cost of the Nikon, Kodak, or Canon "look alikes" - I can't tell
it apart from a Nikon version which I almost bought, has a 2.5X switchable,
magnifier, and it comes with 5 slide mount brackets to fit over a dozen brands
& models of SLR's. I bought it to fit my Kodak DSLR, which has a Nikon body.
The Canon, Sony, Minolta etc., mount brackets are superfluous for me, for now.
That being the case, I am considering using one of the "least likely to be
used" (Minolta in my case), slide mount bracket as a base, to a short plastic
barrel, that could be slid onto the Polar Scope barrel. This now adapts the
PAS to the right angle viewer, just as though it were yet another model DSLR
camera!

The beauty of this setup is that the view is erect and "not reversed" -
obviously, since if you use a right angle viewer attached to your SLR, you
would expect the "framing view" to be unchanged.
So, I see the same reticule view of Polaris whether I do the alignment in
comfort while standing, or wrench my body and look through the PAS (the hard
way). Also, it is made of plastic, so it is a feather weight attached to the
PAS. Being able to switch it to any SLR camera you might own, is a real bonus,
when you are using more than one camera model on your scope - otherwise, you
would have spent over $200 for each brand for individual right angle viewers.
In this case, one RAV fits ALL, even the PAS, with a little bit of trivial
adaptation!

This should be a standard PAS accessory - I will never go back to the
standard way of using it, once I get one of the spare camera slide mount
adapter modified.

P.S.
Barry Carter has tested three right angle viewers on his website.
The Hoodman HRAV, looks identical to the Nikon DR-6 in his article:
"Nikon D70 Manual Focus Aids".

Joe


Re: Reticle illuminator fried

planetary_hunter
 

--- In ap-gto@..., "r1300rs" <cardiofuse@...> wrote:

Ok, it was dark and the first time using my new AP900. I
accidently plugged the illuminator
cable (with polarity switching adapter) to the 6volt connection
instead of the reticle
connection (3 volt I assume). Naturally I smoaked the red LED.
Will this cause any harm to
the control box (versus my pride)? How would I obtain a
replacement; from Losmandy?

Roland, thanks for the hat and keychain; I'm the envy of the
Colonel.

Thanks,

I remain bruised.
You got a hat?

Bryan


Sharpless 2-119 halpha

Richard Crisp
 

300mm f/4 pentax 6x7 camera lens

fli img6303 camera

ap1200gto

baader 7nm halpha filter
http://www.narrowbandimaging.com/sh2_119_p300_6303_baader_ha_page.htm


Sharpless 2-54

Richard Crisp
 

it took a few more nights than I originally expected due to too much fog lately, but I now have enough data to at least see what the "Scary Face Nebula" looks like as a tricolor emission line image shot in Sulfur, Hydrogen and Oxygen.

this is 6x 20 minutes of Halpha, 7x20 minutes of [SII] and 20x20 minutes of [OIII] shot using the Stinger 450, Dream Machine, 4.5nm CS emission line filters and AP1200GTO.

the [OIII] was a real bear for me due to the object being in my southern sky and that is right in the middle of silicon valley light pollution. Plus it is shooting over my roof and is pretty low in the sky.

Adding to the misery is the fact that the [OIII] signal is very faint. Hence the 20 exposures of 20 minutes.

The [SII] really needs more exposure time too. I had to smooth the layer to keep the noise under control and I usually don't like to do that. So more [SII] is the order for the next imaging session.

The Halpha seems fine as is: there's a lot of Halpha strength in this object.

http://www.narrowbandimaging.com/sh2_54_mk1sn2_dm_geg_cs_s2hao3_page.htm

it would be nice if the seeing was better :-)


Re: APM Telescope (175mm) and AP900 weight limits

Hank Sielski
 

Hi,

I have a friend with an AP 180/F9 which he used to use visually on an
AP900. He was generally happy with it, except on windy nights. So he (like
Eric) also upgraded to the 1200. Of course you do sacrifice some
portability. but I would certainly agree that the 1200 is the way to go with
this scope, if you're intent on doing imaging.

Hank

On 8/18/07, r1300rs <cardiofuse@...> wrote:

Thank you for the very useful information. I believe you are right on
point regarding the
mount. I don't think that by adding 1 more inch to my normal scope will do
much for CCD
imaging but the mount, clear skys and technique will make a difference.
Perhaps I should
stay with the 150-160mm range. I have to stay portable with my location.



Reticle illuminator fried

r1300rs
 

Ok, it was dark and the first time using my new AP900. I accidently plugged the illuminator
cable (with polarity switching adapter) to the 6volt connection instead of the reticle
connection (3 volt I assume). Naturally I smoaked the red LED. Will this cause any harm to
the control box (versus my pride)? How would I obtain a replacement; from Losmandy?

Roland, thanks for the hat and keychain; I'm the envy of the Colonel.

Thanks,

I remain bruised.


Re: APM Telescope (175mm) and AP900 weight limits

r1300rs
 

Thank you for the very useful information. I believe you are right on point regarding the
mount. I don't think that by adding 1 more inch to my normal scope will do much for CCD
imaging but the mount, clear skys and technique will make a difference. Perhaps I should
stay with the 150-160mm range. I have to stay portable with my location.


Re: APM Telescope (175mm) and AP900 weight limits

Eric Baumgartner
 

Hi, there:

I have had a TMB 175 f/8.0 "classic" (the one with the silver CNC focuser
and silver tube rings) for about two years now. It is a heavier OTA than the
new versions of this scope; I think mine weighs in at 48 lbs, including the
massive rings.

I first mounted it on a new AP900GTO with the 15" ribbed mounting plate
(900RPA), following the lead of a friend who has had good success with this
combination for visual use. Scope vibrations didn't damp out quickly enough
for my tastes, and I have since upgraded to the AP1200 with the 24" ribbed
mounting plate (1200RP). I am very happy with this arrangement. Damping time
is about one second now, and the long tube is much more resistant to
breezes. I think that a lot has to do with the length of the 24" mounting
plate, which spaces the tube rings nearly two feet apart, and thus
significantly reduces the lengths of the cantilevered focus and objective
ends.

If I were an imager, I don't think that there would be any question but to
go with the larger A-P mount. As Roland has said on this forum on at least
one occasion, the three most important parts to successful imaging are (1)
the mount, (2) the mount, and (3) the mount.

Hope this helps,

Eric Baumgartner
Redding, CT USA

On 08/17/07 3:23 PM, "r1300rs" <cardiofuse@...> wrote:

I was wondering if the APM 175/1400 (6.9") refractor which weighs in at 39
pounds and 45 pounds with the tube rings and brackets will fit on my new AP900
without too much stress.

The only other additional weight would include the SBIG
Camera/finder/telecompressor; probably another 5-8 pounds. This gives a total
of about 53 pounds.

I see the specs on the AP900 will carry 70 pounds but this scope isf/8 and
close to 60 inches long.

Any thoughts?

You guessed it; I'm on the 4+ year plan for an AP scope.

Thanks!


Re: Mount does not stop Update - E1 chip installed

bcoote37
 

Hi Roland,
I have Sky 6 and have been using a 500ms update frequency. I just changed it to 4000 ms and on re-opening The Sky it had become 4 ms
In fact any figure over 3000 ms reverts to the single first digit.
It saved 2900ms update time fine however.
Brian
http://www.bcoote-astro.com/default.htm

----- Original Message -----
From: chris1011@...
To: ap-gto@...
Sent: Saturday, August 18, 2007 2:16 AM
Subject: Re: [ap-gto] Re: Mount does not stop Update - E1 chip installed


In a message dated 8/17/2007 1:15:17 AM Central Daylight Time,
cluster@... writes:

> Next I need to change out the serial cables themself just to get them
> out of the picture. But running both programs with 2 serial cables
> still won't fly, its very easy to get pulse guide not to stop the mount
> from slewing.
>

What two programs do you have attached to the two serial cables? Is one of
them TheSky6? If so, what refresh rate do you have for the position cursor? If
it is a fast rate, try changing it to update position every 2 - 4 seconds. If
your refresh rate for the position cursor is very fast, the servo may become
overloaded with requests for RA/DEC position and not have time to respond to any
other commands.

Rolando

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