Date   

NASA's guide to Black Holes

Roland Christen
 

Enjoy!

https://www.youtube.com/watch?v=aMTwtb3TVIk

Rolando

--
Roland Christen
Astro-Physics


Re: 1200GTO servicing project notes

Joe Zeglinski
 

Good idea about using extractor bits, if the plugs are not “mushed” inside ..
 
    But, if the AP-900/1200 Delrin plugs are pushed in so far, that they “mushroom-head” into the space beyond the threads, then there is no way that the screw extractor bit, or even the AP Tool,  will unscrew the originally smooth, but now “thread-impressed Delrin”, or pull it out without fracturing the plastic plug. Happened to mine, requiring complete disassembly to get the plug pieces out.
 
Joe
 

From: fernandorivera3 via groups.io
Sent: Thursday, April 22, 2021 1:57 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] 1200GTO servicing project notes
 
Dale thanks for commenting. I have a 1200 GTO that I bought brand new from AP in July 2009. No problems yet with delrin clutch plugs getting stuck or seized & hoping it stays that way 🤞

Fernando


Re: AP1100 park position question

Joe Zeglinski
 

I agree, Bryan.
 
    If I were to go with a dual lift PT3, and there was a possibility of any cold weather seizing problem, I would be concerned about one of the two piers, lagging behind its mate, unless there is an “overload-cutoff” sensor.
 
Joe
 

From: Worsel via groups.io
Sent: Thursday, April 22, 2021 5:39 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question
 
Joe

I live in western Colorado and have had the PierTech adjustable pier (which, AFAIK, is a Linak) for 6 years without any issues...and I bought it used from someone who lived in Silverton (I live in the colorado banana belt by comparison).  Temperature range here is frequently -5C to +25 and has been, on occasion, -15 to +30 over the course of a year.  That said, I have never operated it close to those extremes (my limit, not the equipment!) 8-).  Storage range is -20 to +70C, which I would equate to just sitting in the observatory without movement.

Also it will go through its full 50cm range of motion in 25s (2 cm/s); so the 19 minute pause after one minute is never a factor.  I do not try to fine-tune.  I have the operational height marked on the inner column.

If I was going to change anything, I would pay the additional $1000US over the PT2 and buy the dual pier (PierTech PT3) to ensure stability.

Bryan


Re: APPM model how many points portable?

Worsel
 

Greg

From APPC Pro manual

To use APPM with your mount you will need to have the following:

1) Camera Control Software and a camera supported by that software:
a) MaxIm DL Pro v5 or later -
b) CCDSoft V5
c) TheSkyX Pro Camera Add-on
d) AstroArt V3 or later
e) Any camera with an ASCOM Camera Driver
f) Sequence Generator Pro.
g) Meade DSI I-III cameras are also supported, but their sensors are usually not large enough to
capture enough stars for reliable plate solves.

2) Plate Solving Software:
a) The full version of DC3 Dreams PinPoint application. Version 6 of Pinpoint is preferred.
b) TheSkyX Pro
c) Plate solving using Sequence Generator Pro

Eventually Ray will integrate ASTAP into APPM.


Bryan


Re: GTOCP4 Caps

Joe Zeglinski
 

Hi Mike,
 
    I ordered the plastic caps set for mine. They really should come standard with any CPx controller, and the metal ones offered as a valuable option.
 
    Two things to keep in mind about sourcing the such caps elsewhere.
 
    First, the AP set also includes that ...  tiny plastic plug ... for the CP4/5 USB port (which I don’t use), and it isn’t one of the common PC caps listed in a recent vendor link. The USB and Ethernet socket protection plugs are essential, since these can - (in some perhaps rare cases, like older mount top-side placement), become “tiny water reservoirs”  exposed to dew rolling off an OTA slewing by, potentially  puddling inside the controller. My two unfortunate experiences.
The other  Mil-Spec Amphenol socket ports not only have hermetically sealed leak-proof pin bases inside their sockets, but are very firmly bolted from behind, preventing any panel seepage.
 
    Second, I wonder if the metal caps could become “FROZEN”, (perhaps) difficult to unscrew,  on  exceptionally cold northern winter days.
Guess I would have to either have a portable hair dryer or take the controller indoors, or into the heated vehicle to thaw out the caps.
 
    Tony’s detailed, excellent video  - as  his always are -  about sourcing these metal caps, mentions their underlying “rubber cushions” to provide some push-back, allowing the twist-bayonet cap locks to be snugged-up. But, another benefit of the rubber cushion is to hermetically seal up the exposed tops of the pins, during storage, so they don’t oxidize as easily.
 
    However, I would caution about snipping off the “cap chains” if the scope travels to a dark site. You might lose a cap in the snow or dark ground cover, if they aren’t at least tethered by a shared lanyard to the pier/mount. The black plastic caps are far easier to lose.
If I don’t opt for replacing some of them with the metal caps, I may paint the standard AP black ones with glow-in-the-dark paint. Red plastic “CAPLUGS”, like the AP reducer covers, etc.  would have been somewhat better in that regard, but round ones may not be commonly available in such a wide assortment.
 
Joe Z.
 
 

From: M Hambrick
Sent: Thursday, April 22, 2021 11:58 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] GTOCP4 Caps
 
Hi Linwood

Actually, Astro-Physics offers a set of plastic covers for all of the connectors on the GTOCP4/5 and the mount motors. You will have to call them to order a set. The interest in the metal covers is because they are more durable, and they will stay put, but as a minimum you should get a set of the plastic ones. I think they run about $15.00.

Mike


Re: AP1100 park position question

Worsel
 

Joe

I live in western Colorado and have had the PierTech adjustable pier (which, AFAIK, is a Linak) for 6 years without any issues...and I bought it used from someone who lived in Silverton (I live in the colorado banana belt by comparison).  Temperature range here is frequently -5C to +25 and has been, on occasion, -15 to +30 over the course of a year.  That said, I have never operated it close to those extremes (my limit, not the equipment!) 8-).  Storage range is -20 to +70C, which I would equate to just sitting in the observatory without movement.

Also it will go through its full 50cm range of motion in 25s (2 cm/s); so the 19 minute pause after one minute is never a factor.  I do not try to fine-tune.  I have the operational height marked on the inner column.

If I was going to change anything, I would pay the additional $1000US over the PT2 and buy the dual pier (PierTech PT3) to ensure stability.

Bryan


Re: Time issues?

Pete Mumbower
 

Look like I need extra valium for tomorrow too. UPS delivered 4 of 6 boxes! At least it looks like the important ones (RA/Dec axis are here!) ;)


Re: AP1100 park position question

Worsel
 

Howard

You should know as well as anyone that we NEVER have the largest aperture scope we want!  ;)

Bryan


...
PLEASE!  PLEASE!   PLEASE!  Do NOT make your roll-off walls so low that you only barely clear the scope.  Allow for the largest diameter scope that you ever plan to own, and then allow a bit of cushion.  Unless you are on the highest point on a small desert island, you won't be imaging right at the horizon, so slightly taller walls won't hurt you. 


Re: APPM model how many points portable?

Dale Ghent
 

APPM and NINA currently don't talk with each other. You will need to run APPM by using your camera's ASCOM driver and any of the plate solving mechanisms that are currently supported by APPM.

I personally go about it with APPM connected to the camera via its ASCOM driver, and using TheSkyX's ImageLink plate solving. Once the modeling run is done, I shut all that down, make sure the new model is loaded up in APCC, then start NINA and go about my usual workflow.

/dale

On Apr 22, 2021, at 17:03, Greg McCall <emailgregnow@gmail.com> wrote:

How do you get APPM to work with "NINA and ASTAP combo"?


Re: More APPM Results -- Can Someone Help Me Understand This?

Don Anderson
 

USNO-B1.0 has been taken off line by USNO. The only way to use B 1.0 is if you have a local version on you computer.

Don Anderson


On Thursday, April 22, 2021, 01:32:49 p.m. MDT, Ray Gralak <iogroups@...> wrote:


> Ray i think that comment refers to  USNO-SA2.0
>
> USNO-SA2.0 is a subset of USNO-A2.0

Yes, that is true about SA2.0, but A2.0 has been superseded by USNO-B1.0.

-Ray

> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Brian Valente
> Sent: Thursday, April 22, 2021 12:17 PM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?
>
> Ray i think that comment refers to  USNO-SA2.0
>
> USNO-SA2.0 is a subset of USNO-A2.0
>
>
> On Thu, Apr 22, 2021 at 12:13 PM Ray Gralak <iogroups@...> wrote:
>
>
>     > For small fields of view with Pin Point, the USNO-A2.0 catalog is recommended by DC3 Dreams.
>
>     Bad information maybe?
>
>     According to the navy.mil website, USNO A2.0 is outdated:
>
>     https://www.usno.navy.mil/USNO/astrometry/information/catalog-info#usnoa2
>
>     -Ray
>
>
>
>     > -----Original Message-----
>     > From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of George
>     > Sent: Thursday, April 22, 2021 12:05 PM
>     > To: main@ap-gto.groups.io
>     > Subject: Re: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?
>     >
>     > For small fields of view with Pin Point, the USNO-A2.0 catalog is recommended by DC3 Dreams.
>     >
>     >
>     >
>     > Regards,
>     >
>     >
>     >
>     > George
>     >
>     >
>     >
>     > George Whitney
>     >
>     > Astro-Physics, Inc.
>     >
>     > Phone:  815-222-6538 (direct line)
>     >
>     > Phone:  815-282-1513 (office)
>     >
>     > Email:  george@... <mailto:george@...>
>     >
>     >
>     >
>     > From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of mjb87 via groups.io
>     > Sent: Thursday, April 22, 2021 1:49 PM
>     > To: main@ap-gto.groups.io
>     > Subject: Re: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?
>     >
>     >
>     >
>     > BTW, I am using PinPoint and they do NOT recommend UCAV4.
>     >
>     >
>
>
>
>
>
>
>
>
>
>
> --
>
> Brian
>
>
>
> Brian Valente
> portfolio brianvalentephotography.com  <http://brianvalentephotography.com>
>







Re: APPM model how many points portable?

Greg McCall
 

How do you get APPM to work with "NINA and ASTAP combo"?


Re: Time issues?

Don Anderson
 

Yes. Don't want to pass the event horizon!

Don Anderson


On Thursday, April 22, 2021, 02:55:46 p.m. MDT, M Hambrick <mhambrick563@...> wrote:


It is also related to the increase in the force of gravity as you age.


Re: AP1100 park position question

Don Anderson
 

Hi Joe
One of our local guys used the Pier Tech version in Calgary here in a Tele Station 3 for a few years then moved it to Toronto area. I don't believe he had any problems. You are right though it is an indoor rated product so one would have to keep it free of rain and snow.

Don Anderson


On Thursday, April 22, 2021, 02:24:43 p.m. MDT, Joe Zeglinski <j.zeglinski@...> wrote:


Thanks Chris,
 
    For your link to Linak disti’s – I was quite pleasantly surprised to find that LINAK-Canada was so handy, only a couple of miles away from me in Toronto.
 
    One thing that concerns me is the operating temperature range, and outdoor climate. Those are Spring/Fall ambient temperatures around here.  The LINAK is meant for “medical facilities or office areas”, and might be a problem outdoors, if it needed to be operated unexpectedly, on a cold northern winter day. I suppose, no problem in Hawaii.
Perhaps, once we have the scope height calibrated, the automation just lifts quickly, so in rare use this doesn’t become a significant issue.
Usage:
• Single drive or parallel drive
• Duty cycle: max. 5 %, max. 1 minute continuous use followed by 19 minutes pause
• Ambient temperature: 5 to 40 °C • Storage and transport temperature: -20 to +70 °C
    Likewise, the Duty cycle means that there is no “playing around” trying to find an ideal scope elevation, or the exercise may take hours, just in wait time. Is this the same with PIERTECH’s lifters?
 
    Anyway, an interesting product I will think about.
Joe
 
Sent: Thursday, April 22, 2021 1:00 AM
Subject: Re: [ap-gto] AP1100 park position question
 
I believe if you ask them, Linak will give you a list of their distributors.

-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   
 
On Wed, Apr 21, 2021, 2:34 PM Don Anderson via groups.io <jockey_ca=mailto:yahoo.ca@groupsio> wrote:
Thanks for the info Jack. I suspected as much. I checked ebay and they don't show and DL2s right now. I will have to keep my eyes open for one.
 
Don Anderson
 
 
On Wednesday, April 21, 2021, 07:51:02 a.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:
 
 

Don,

 

When I purchased the original pair of lifting columns from Linak, I was over the engineering department of the local public works department in New Orleans and we did a lot of custom fabrications for all of our facilities.  As such, I was able to have them sell me two 1000 Newton columns and the associated controls.   Since I was already an established customer, I was able to get an upgraded set of 2500 Newton columns and associated controls last year.

 

I do not think Linak sells to the general public.

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Don Anderson via groups.io
Sent: Tuesday, April 20, 2021 11:47 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Jack

Did Linak sell direct to you?

 

Don Anderson

 

 

On Tuesday, April 20, 2021, 09:36:40 p.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:

 

 

Christopher,

 

The company is Linak out of Kentucky and the columns I used were the DL2 2500 Newton rated.  My original ones were rated at 1000 Newtons each when used with a non AP mount.  With the AP1600 and 150# of equipment on the dual column setup, I changed to the 2500 Newton thrust each – 5000 Newton total thrust.

 

DL2: Robust lifting column for desks, workstations and kitchens (linak-us.com)

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Christopher Erickson
Sent: Tuesday, April 20, 2021 10:09 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Lymax columns. A lot cheaper to buy Lymax off of Ebay or wherever and make your own telescoping pier.


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

 

On Tue, Apr 20, 2021, 9:27 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:

Shailesh

I have used Park 4 for several years for exactly the roof height issues that you are evaluating.  This is for a 1100 mount with a 14 CDK scope.  There have been no problems.

I have a PierTech height adjustable pier (http://piertechinc.com/telescope-piers/).  When I need to tinker with equipment, I lower the mount and move it to P3, where it clears the roof. To remove equipment, I loosen the clutches (older style 1100) and rotate/lower the OTA to a separate support table before loosening the dovetail.  I normally leave the pier at almost max height, in order for the roof to clear on opening.

The adjustable piers are actually from another company, but I have forgotten the name.  I think Chris Erickson has these.

Bryan

 

Virus-free. www.avg.com


Re: Time issues?

M Hambrick
 

It is also related to the increase in the force of gravity as you age.


Re: AP1100 park position question

Don Anderson
 

Thanks for the info Jack. I would be lifting an AP900 with a 5" refractor and associated guide and finder scopes, cameras and controllers. All told about 90 lb. I may at some point get a 10" or 12" CDK or a larger 160 -175mm refractor. This may push the total weight to maybe 120lb or so. Would a 1000 be good enough? Is there much of a price difference between them?
Don

Don Anderson


On Thursday, April 22, 2021, 12:39:42 p.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:


Don,

 

Note that the DL2 is available in three thrust capacities – 1000 Newton, 1500 Newton and 2500 Newton (220#, 333# and 555#).  I am using a dual column system so I went from a 440# lifting capacity to a 1111# lifting capacity.

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Don Anderson via groups.io
Sent: Wednesday, April 21, 2021 7:34 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Thanks for the info Jack. I suspected as much. I checked ebay and they don't show and DL2s right now. I will have to keep my eyes open for one.

 

Don Anderson

 

 

On Wednesday, April 21, 2021, 07:51:02 a.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:

 

 

Don,

 

When I purchased the original pair of lifting columns from Linak, I was over the engineering department of the local public works department in New Orleans and we did a lot of custom fabrications for all of our facilities.  As such, I was able to have them sell me two 1000 Newton columns and the associated controls.   Since I was already an established customer, I was able to get an upgraded set of 2500 Newton columns and associated controls last year.

 

I do not think Linak sells to the general public.

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Don Anderson via groups.io
Sent: Tuesday, April 20, 2021 11:47 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Jack

Did Linak sell direct to you?

 

Don Anderson

 

 

On Tuesday, April 20, 2021, 09:36:40 p.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:

 

 

Christopher,

 

The company is Linak out of Kentucky and the columns I used were the DL2 2500 Newton rated.  My original ones were rated at 1000 Newtons each when used with a non AP mount.  With the AP1600 and 150# of equipment on the dual column setup, I changed to the 2500 Newton thrust each – 5000 Newton total thrust.

 

DL2: Robust lifting column for desks, workstations and kitchens (linak-us.com)

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Christopher Erickson
Sent: Tuesday, April 20, 2021 10:09 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Lymax columns. A lot cheaper to buy Lymax off of Ebay or wherever and make your own telescoping pier.


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

 

On Tue, Apr 20, 2021, 9:27 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:

Shailesh

I have used Park 4 for several years for exactly the roof height issues that you are evaluating.  This is for a 1100 mount with a 14 CDK scope.  There have been no problems.

I have a PierTech height adjustable pier (http://piertechinc.com/telescope-piers/).  When I need to tinker with equipment, I lower the mount and move it to P3, where it clears the roof. To remove equipment, I loosen the clutches (older style 1100) and rotate/lower the OTA to a separate support table before loosening the dovetail.  I normally leave the pier at almost max height, in order for the roof to clear on opening.

The adjustable piers are actually from another company, but I have forgotten the name.  I think Chris Erickson has these.

Bryan

 

Virus-free. www.avg.com


Re: Time issues?

Don Anderson
 

it's called anticipation general relativityEmoji

Don Anderson


On Thursday, April 22, 2021, 12:30:37 p.m. MDT, Pete Mumbower <pmumbower@...> wrote:


Is it me or does time slow down the day you are waiting for the brown truck to deliver your new mount (1100GTO)?


Re: AP1100 park position question

Joe Zeglinski
 

Thanks Chris,
 
    For your link to Linak disti’s – I was quite pleasantly surprised to find that LINAK-Canada was so handy, only a couple of miles away from me in Toronto.
 
    One thing that concerns me is the operating temperature range, and outdoor climate. Those are Spring/Fall ambient temperatures around here.  The LINAK is meant for “medical facilities or office areas”, and might be a problem outdoors, if it needed to be operated unexpectedly, on a cold northern winter day. I suppose, no problem in Hawaii.
Perhaps, once we have the scope height calibrated, the automation just lifts quickly, so in rare use this doesn’t become a significant issue.
Usage:
• Single drive or parallel drive
• Duty cycle: max. 5 %, max. 1 minute continuous use followed by 19 minutes pause
• Ambient temperature: 5 to 40 °C • Storage and transport temperature: -20 to +70 °C
    Likewise, the Duty cycle means that there is no “playing around” trying to find an ideal scope elevation, or the exercise may take hours, just in wait time. Is this the same with PIERTECH’s lifters?
 
    Anyway, an interesting product I will think about.
Joe
 
From: Christopher Erickson
Sent: Thursday, April 22, 2021 1:00 AM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question
 
I believe if you ask them, Linak will give you a list of their distributors.

-Christopher Erickson
Observatory engineer
Waikoloa, HI 96738
www.summitkinetics.com
   
 
On Wed, Apr 21, 2021, 2:34 PM Don Anderson via groups.io <jockey_ca=mailto:yahoo.ca@groupsio> wrote:
Thanks for the info Jack. I suspected as much. I checked ebay and they don't show and DL2s right now. I will have to keep my eyes open for one.
 
Don Anderson
 
 
On Wednesday, April 21, 2021, 07:51:02 a.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:
 
 

Don,

 

When I purchased the original pair of lifting columns from Linak, I was over the engineering department of the local public works department in New Orleans and we did a lot of custom fabrications for all of our facilities.  As such, I was able to have them sell me two 1000 Newton columns and the associated controls.   Since I was already an established customer, I was able to get an upgraded set of 2500 Newton columns and associated controls last year.

 

I do not think Linak sells to the general public.

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Don Anderson via groups.io
Sent: Tuesday, April 20, 2021 11:47 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Jack

Did Linak sell direct to you?

 

Don Anderson

 

 

On Tuesday, April 20, 2021, 09:36:40 p.m. MDT, Jack Huerkamp <mallincamusa@...> wrote:

 

 

Christopher,

 

The company is Linak out of Kentucky and the columns I used were the DL2 2500 Newton rated.  My original ones were rated at 1000 Newtons each when used with a non AP mount.  With the AP1600 and 150# of equipment on the dual column setup, I changed to the 2500 Newton thrust each – 5000 Newton total thrust.

 

DL2: Robust lifting column for desks, workstations and kitchens (linak-us.com)

 

Yours truly,

 

Jack

 

Jack Huerkamp

Jack's Astro Accessories, LLC

38388 Pine Street

Pearl River, LA 70452-5192

985-445-5063

mallincamusa@...

www.mallincamusa.com

30.37N  89.76W

 

All of us get lost in the darkness.
Dreamers learn to steer by the stars.

………………………………….Neil Peart

 

 

 

From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of Christopher Erickson
Sent: Tuesday, April 20, 2021 10:09 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] AP1100 park position question

 

Lymax columns. A lot cheaper to buy Lymax off of Ebay or wherever and make your own telescoping pier.


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

 

On Tue, Apr 20, 2021, 9:27 AM Worsel via groups.io <bryancashion=yahoo.com@groups.io> wrote:

Shailesh

I have used Park 4 for several years for exactly the roof height issues that you are evaluating.  This is for a 1100 mount with a 14 CDK scope.  There have been no problems.

I have a PierTech height adjustable pier (http://piertechinc.com/telescope-piers/).  When I need to tinker with equipment, I lower the mount and move it to P3, where it clears the roof. To remove equipment, I loosen the clutches (older style 1100) and rotate/lower the OTA to a separate support table before loosening the dovetail.  I normally leave the pier at almost max height, in order for the roof to clear on opening.

The adjustable piers are actually from another company, but I have forgotten the name.  I think Chris Erickson has these.

Bryan

 

Virus-free. www.avg.com


Re: 1200GTO servicing project notes

Dale Ghent
 

Well, yes of course you don't need to change something if it's working fine :)

In my case there was substantial drag on the axis when releasing the clutches and moving the axes. This was because the plugs had been pushed in too hard and for too long by overtightened clutch knobs. It wasn't all that much of a surprise given the mount's age and how many people have used it over the yea.

Fixing it was cheap and easy and the screw extractors make it so that you don't need to buy a tool from A-P or grind down your own using a flat-bladed screwdriver. I'm honestly amazed that this particular topic has garnered so much bike-shedding.

On Apr 22, 2021, at 15:19, Don Anderson via groups.io <jockey_ca=yahoo.ca@groups.io> wrote:

About a year ago the topic of changing clutch plugs came up. I have an AP900GOTO CP3 2008 model so I asked George about whether one should change the plugs on spec. He said if they are working fine never change them.

Don Anderson


On Thursday, April 22, 2021, 11:58:12 a.m. MDT, fernandorivera3 via groups.io <fernandorivera3=yahoo.com@groups.io> wrote:


Dale thanks for commenting. I have a 1200 GTO that I bought brand new from AP in July 2009. No problems yet with delrin clutch plugs getting stuck or seized & hoping it stays that way 🤞

Fernando


Re: GTOCP4 Caps

ap@CaptivePhotons.com
 

> But you won’t need to request them; each mount is shipped with the set. 

 

An even better thing to know, thanks!

 


Re: More APPM Results -- Can Someone Help Me Understand This?

Ray Gralak
 

BTW,

USNO A2.0 has an accuracy of 0.25 arc-secs and doesn't account for stellar proper-motion.

UCAC4 has an accuracy of 0.05-0.10 arc-sec and accounts for stellar proper-motion.

-Ray

-----Original Message-----
From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of Brian Valente
Sent: Thursday, April 22, 2021 12:17 PM
To: main@ap-gto.groups.io
Subject: Re: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?

Ray i think that comment refers to USNO-SA2.0

USNO-SA2.0 is a subset of USNO-A2.0


On Thu, Apr 22, 2021 at 12:13 PM Ray Gralak <iogroups@siriusimaging.com> wrote:


> For small fields of view with Pin Point, the USNO-A2.0 catalog is recommended by DC3 Dreams.

Bad information maybe?

According to the navy.mil website, USNO A2.0 is outdated:

https://www.usno.navy.mil/USNO/astrometry/information/catalog-info#usnoa2

-Ray



> -----Original Message-----
> From: main@ap-gto.groups.io [mailto:main@ap-gto.groups.io] On Behalf Of George
> Sent: Thursday, April 22, 2021 12:05 PM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?
>
> For small fields of view with Pin Point, the USNO-A2.0 catalog is recommended by DC3 Dreams.
>
>
>
> Regards,
>
>
>
> George
>
>
>
> George Whitney
>
> Astro-Physics, Inc.
>
> Phone: 815-222-6538 (direct line)
>
> Phone: 815-282-1513 (office)
>
> Email: george@astro-physics.com <mailto:george@astro-physics.com>
>
>
>
> From: main@ap-gto.groups.io <main@ap-gto.groups.io> On Behalf Of mjb87 via groups.io
> Sent: Thursday, April 22, 2021 1:49 PM
> To: main@ap-gto.groups.io
> Subject: Re: [ap-gto] More APPM Results -- Can Someone Help Me Understand This?
>
>
>
> BTW, I am using PinPoint and they do NOT recommend UCAV4.
>
>










--

Brian



Brian Valente
portfolio brianvalentephotography.com <http://brianvalentephotography.com>

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