Date   

Re: Adding Primaluce Labs ECCO2 for Environmental sensor?

Worsel
 

You can find station pressure and airport pressure with the following  link

https://www.wrh.noaa.gov/mesowest/timeseries.php?sid=Kxxx

where xxx is the FAA code for the whatever airport you want.

Bryan


Re: Adding Primaluce Labs ECCO2 for Environmental sensor?

Worsel
 

Brent

Are your 'multiple source' based on airport readings?  Airports correct their readings to pressure at sea level, the reference standard to which pilots set their altimeters.

Example: western Colorado (right now).  Airport pressure for altimeters = 1009, Station pressure (actual) = 817  (Elevation = 1745m)

Bryan


Re: Levelling 119FSA for AP1100 RA base

Christopher Erickson
 

Absolutely not a concern.


-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   

On Tue, Jun 8, 2021, 4:21 AM Shailesh Trivedi <strivedi@...> wrote:
I am trying to mount my AP1100 GTO AE to a permanent non-AP pier for the first time.

The bubble level is a bit off-center (see attached image).

Is this a concern? Should I put shims under the 119FSA to try to center the bubble? My application is astrophotography.

Shailesh


Re: Question about the Adapter for the Losmandy polar scope.

Ron Yates
 

Thanks.  I contacted AP today, and they told me about the threaded adapter.  Just ordered it.

Ronnie Yates.


On Tue, Jun 8, 2021 at 7:53 AM Robert <rwatters65@...> wrote:
You'll need part # M4037 in addition to the Q8140 you already have.  I believe this originally came with the mount so someone must have removed it somewhere along the years.
M4037 will thread into the shaft end of the 1200 and then the Q8140/polarscope combo will thread into that.

Robert


Re: Levelling 119FSA for AP1100 RA base

Shailesh Trivedi
 

Thanks for your feedback Mike. I do not have such a method. The only option I have is to put shims under the 119FSA.

Shailesh


Re: Photo Notifications #photo-notice

M Hambrick
 

Way to go Tony !! Good pictures.

Moose is already pretty famous. Charlie is less so, but he is more respectful of the hat :>)

Mike 


Re: Levelling 119FSA for AP1100 RA base

Mike Dodd
 

On 6/8/2021 10:21 AM, Shailesh Trivedi wrote:
I am trying to mount my AP1100 GTO AE to a permanent non-AP pier for the
first time.

The bubble level is a bit off-center (see attached image).
How is the mount attached to the pier? I cast a concrete pier, then bolted an A-P SPA Standard Pier Adapter to four 5/8" threaded rods embedded in the concrete. I put nuts on the rods to allow me to adjust the level of the SPA. This photo shows the setup: <http://astronomy.mdodd.com/observatory.html#PierBolts>

Can you do something similar?

--- Mike


Levelling 119FSA for AP1100 RA base

Shailesh Trivedi
 

I am trying to mount my AP1100 GTO AE to a permanent non-AP pier for the first time.

The bubble level is a bit off-center (see attached image).

Is this a concern? Should I put shims under the 119FSA to try to center the bubble? My application is astrophotography.

Shailesh


Re: Question about the Adapter for the Losmandy polar scope.

George
 

Ron,

 

If you have questions, call me.

 

Regards,

 

George

 

George Whitney

Astro-Physics, Inc.

Phone:  815-222-6538 (direct line)

Phone:  815-282-1513 (office)

Email:  george@...

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Ron Yates
Sent: Tuesday, June 8, 2021 12:35 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] Question about the Adapter for the Losmandy polar scope.

 

Actually, upon checking at the Losmandy web site, our polar scope IS the one that they currently sell.  So the idea that we are using a 'prior' model is not the right answer.  Moreover, I own a scope that I purchased in 2009.  The scope the society owns was purchased 2 years ago.  Both are the exact same scope, and both are the same as what is currently being sold.  The only difference is that mine had the previous illuminator that was sold with it, which I have since replaced with the new one.


Re: Adding Primaluce Labs ECCO2 for Environmental sensor?

Brent Boshart
 

Wayne or anyone else,  do you find the pressure reading on your ECCO2 to be accurate?  I recently purchased one and the pressure is way off.  I get readings around 967 whereas multiple weather sources report around 1010.  


Re: Question about the Adapter for the Losmandy polar scope.

Robert
 

You'll need part # M4037 in addition to the Q8140 you already have.  I believe this originally came with the mount so someone must have removed it somewhere along the years.
M4037 will thread into the shaft end of the 1200 and then the Q8140/polarscope combo will thread into that.

Robert


Re: Question about the Adapter for the Losmandy polar scope.

Ron Yates
 

Actually, upon checking at the Losmandy web site, our polar scope IS the one that they currently sell.  So the idea that we are using a 'prior' model is not the right answer.  Moreover, I own a scope that I purchased in 2009.  The scope the society owns was purchased 2 years ago.  Both are the exact same scope, and both are the same as what is currently being sold.  The only difference is that mine had the previous illuminator that was sold with it, which I have since replaced with the new one.


Re: Question about the Adapter for the Losmandy polar scope.

Jeffc
 

Probably they’ll take a return exchange.  You should call AP.  

I have an AP1200 and a losmandy polar scope.   I also had an AP900 first that I used the Losmandy polar scope.  

I vaguely recall There was a part I had to remove from the AP900 polar scope and use it with the AP1200.   There was a part I thought was part of the polar scope but it wasn’t.  Back then Marj removed the confusion for me.  

Later I added a RPA polar scope.   The RPA uses a different RA axis plate/cover.  Make sure your mount doesn’t have the RPA compatible plate.  The RPA back plate has (iirc) three holes for mounting the RPA.  The older one does not.   
AFAIK the RPA back plate is not (might not?) compatible with the losmandy polar scope.  

-jeff

On Jun 7, 2021, at 8:06 PM, Ron Yates <orogenicman@...> wrote:



One would think that AP has smart people in their employ that would note that the other adapter has threads that fit these polar scopes "from prior years".  Then they could point out on their web site "by the way, if you have a Losmandy polar scope from prior years (whatever that means), you can use the other adapter.

So my question is, if we ship the one we bought back to AP, will they give us credit towards purchasing the other adapter?  And that leads to the critical question, are those large threads on the other adapter in fact the same as the large threads on the Q8140-A?  And are they the same on either end of the adapter?  Our polar scope has the same female threads that are on the 1200GTO.  So we need an adapter that has the same matching male threads on both ends of the adapter.


Re: Question about the Adapter for the Losmandy polar scope.

Ron Yates
 
Edited

One would think that AP has smart people in their employ that would note that the other adapter has threads that fit these polar scopes "from prior years".  Then they could point out on their web site "by the way, if you have a Losmandy polar scope from prior years (whatever that means), you can use the other adapter".

So my question is, if we ship the one we bought back to AP, will they give us credit towards purchasing the other adapter?  And that leads to the critical question, are those large threads on the other adapter in fact the same as the large threads on the Q8140-A?  And are they the same on either end of the adapter?  Our polar scope has the same female threads that are on the 1200GTO.  So we need an adapter that has the same matching male threads on both ends of the adapter.


Re: Question about the Adapter for the Losmandy polar scope.

Peter Nagy
 

According to A-P web site for Q8140-A adapter at https://www.astro-physics.com/q8140-a , it says:

"Please note that we cannot guarantee that the adapter will fit all Losmandy polar scopes from prior years."

Peter 


Re: Question about the Adapter for the Losmandy polar scope.

Ron Yates
 

Here is a photo of the plate on the mount.  It is definitely a 1200.

 


Question about the Adapter for the Losmandy polar scope.

Ron Yates
 

Good evening all.  I have been lurking in the background for a few weeks trying to learn about the AP gtos because our astronomical society recently was given on loan an AP1200GTO.  We have a Losmandy G11 that carries a classic 1986 AP 142mm f7 Starfire which we love dearly.  When we discovered that AP sells an adapter that allows one to use a Losmandy polar scope (which we have) on the 1200 GTO we purchased one, or rather, one of our members purchased one for us.  It arrived at our observatory this last Saturday.  But when I attempted to use it, its construction made no sense to me or anyone else there.  The part number is Q8140-A.  The problem is that we definitely have a 1200GTO.  That is what it says on the plaque, and what the owner told us it was.  The manual description fits it perfectly.  However, when I look at the pictures of the two adapters sold on the AP web site, it now appears that the part that is needed looks exactly like the other adapter.  In other words, our mount has large female threads, exactly like the male threads on one end of this first adapter, but there is no way to fit it to the Losmandy polar scope on the other end of the adapter.  The losmandy polar scope has a female threaded ring that has exactly the same female threads as is on our mount.  So it would seem that what is needed is exactly like the other adapter, which has the part number Q16030 because it has those same male threads on both ends.  That part, it says on the web site, is made for the 1100 and the 1600, not the 1200.  Has anyone else had this problem?  What am I missing?

 

Ronnie Yates


Re: Mach-1 capacity

Luke Leege
 

I can't speak for the 14" but I'm pretty sure the Mach1 was designed for imaging with a 160EDF.


Re: Consequence of .5 guide on hand controller and 1x in software?

Roland Christen
 


However, the dec axis is now more difficult to turn with the clutches released
The clutches have zero to do with the backlash of the Dec axis. This is a very common misunderstanding how mounts with clutches work. Releasing or tightening the clutches has no effect on worm and worm wheel mesh. Clutches do not release the worm from the worm wheel.

Motors will sound different every time you change your socks. Or if the Moon is full or if there is a flood in Kiribati.

Rolando


-----Original Message-----
From: Tom Blahovici <tom.va2fsq@...>
To: main@ap-gto.groups.io
Sent: Mon, Jun 7, 2021 2:33 pm
Subject: Re: [ap-gto] Consequence of .5 guide on hand controller and 1x in software?

Ok.
While we are on this topic of guiding, my AP600e has 2000+ ms backlash.  This is probably why tracking can be off for me.
Although I cannot tell from the usual test of rocking the shaft back and forth, I did follow the instructions on minimizing it.  A few taps and everything seems OK.  However, the dec axis is now more difficult to turn with the clutches released and the motor occasionally sounds different than before, maybe a little labored.  There are no motor stalls though. Is everything OK if there are no motor stalls? (All of this is moot in August when I get my AP1100 but at least it will be optimized for the next user) or should I back off a bit?
Thanks

--
Roland Christen
Astro-Physics


Re: Consequence of .5 guide on hand controller and 1x in software?

Tom Blahovici
 

Ok.
While we are on this topic of guiding, my AP600e has 2000+ ms backlash.  This is probably why tracking can be off for me.
Although I cannot tell from the usual test of rocking the shaft back and forth, I did follow the instructions on minimizing it.  A few taps and everything seems OK.  However, the dec axis is now more difficult to turn with the clutches released and the motor occasionally sounds different than before, maybe a little labored.  There are no motor stalls though. Is everything OK if there are no motor stalls? (All of this is moot in August when I get my AP1100 but at least it will be optimized for the next user) or should I back off a bit?
Thanks

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