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Re: Ap900/Power Supply
Roland Christen
In a message dated 6/14/2009 6:36:59 AM Central Daylight Time,
jhall153@... writes: Are there any power supplies or models that anyone can recommend overWe sell a nice one here at AP. Christine can recommend one for you. Rolando ************** Download the AOL Classifieds Toolbar for local deals at your fingertips. (http://toolbar.aol.com/aolclassifieds/download.html?ncid=emlcntusdown00000004) |
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Re: Ap900/Power Supply
tucstargzr
I've been using an Acopian regulated power supply for years to drive everything in the observatory including two AP mounts. They come up on Ibuy frequently.
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-- In ap-gto@..., "jhall153" <jhall153@...> wrote:
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Re: Ap900/Power Supply
Gedas
Roy, the PS for the AP mount does not have to be mil-spec. The AP mount is extremely insensitive to it's operating voltage so long as it is not current starved and is not near it's low voltage stall condition. I have measured mine under the extremes of heat and cold and have never seen it deviate more than a 1/10th of a volt off the 13.8 V set point under load.
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Gedas, Gallery at http://gedas.me ----- Original Message -----
From: "Roy Uyematsu" <roystarman@...> To: <ap-gto@...> Sent: Sunday, June 14, 2009 11:51 AM Subject: RE: [ap-gto] Ap900/Power Supply Pyramid are good power supplies for the price but are not milspec rated. |
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Re: Ap900/Power Supply
Roy Uyematsu <roystarman@...>
Pyramid are good power supplies for the price but are not milspec rated.
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However if you leave it on all the time and add a switch to the line to your mount I think it could handle very cold temperatures, they generate a fair amount of heat that will keep it functioning. Add a blanket in case it gets really cold like below 0F and I would think it is fine. Roy www.roystarman.com roystarman@... -----Original Message-----
From: ap-gto@... [mailto:ap-gto@...] On Behalf Of Gedas Sent: Sunday, June 14, 2009 9:48 AM To: ap-gto@... Subject: Re: [ap-gto] Ap900/Power Supply I have been using a Pyramid PS-15KX in my roll-off for 3 years now down to 0 degrees F without any problems. I like it since it offers a variety of output terminals including a cigarette lighter socket. I keep it bolted under a shelf on my pier which keeps it nearby but out of the way: http://gedas.cc/v/The+MOO/IMG_8784a.jpg.html Gedas, Gallery at http://gedas.me ----- Original Message ----- From: "jhall153" <jhall153@...> To: <ap-gto@...> Sent: Sunday, June 14, 2009 7:36 AM Subject: [ap-gto] Ap900/Power Supply Are there any power supplies or models that anyone can recommend over ------------------------------------ To UNSUBSCRIBE, or for general information on the ap-gto list see http://groups.yahoo.com/group/ap-gtoYahoo! Groups Links |
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Re: Ap900/Power Supply
Gedas
I have been using a Pyramid PS-15KX in my roll-off for 3 years now down to 0 degrees F without any problems. I like it since it offers a variety of output terminals including a cigarette lighter socket. I keep it bolted under a shelf on my pier which keeps it nearby but out of the way:
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http://gedas.cc/v/The+MOO/IMG_8784a.jpg.html Gedas, Gallery at http://gedas.me ----- Original Message -----
From: "jhall153" <jhall153@...> To: <ap-gto@...> Sent: Sunday, June 14, 2009 7:36 AM Subject: [ap-gto] Ap900/Power Supply Are there any power supplies or models that anyone can recommend over others for the AP900. Especially you guys that operate all year round in cold weather. Mine will be in an observatory. |
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Ap900/Power Supply
jhall153 <jhall153@...>
Are there any power supplies or models that anyone can recommend over others for the AP900. Especially you guys that operate all year round in cold weather. Mine will be in an observatory.
Thanks! |
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Re: AP155 EDF Field Flattener extension tube?
Philip Perkins <ppml3@...>
Rolando,
Excellent! Thanks for super fast response. Philip -- At 19:01 13/06/2009, you wrote: In a message dated 6/13/2009 12:56:39 PM Central Daylight Time,Philip Perkins <ppml3@...> Wiltshire UK & Luberon France www.astrocruise.com -- Note: the above email address may change in future. To find my latest email address please visit: www.astrocruise.com and click the "Send Email" link. -- |
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AP155 EDF Field Flattener extension tube?
Philip Perkins <ppml3@...>
Hello,
Could someone please remind me of the purpose of the 3" extension tube for the AP155 EDF field flattener? (this is the 4" dia field flattener). I don't recall having ever used it and I am thinking of leaving it behind to save weight / space for my upcoming astro trip. Thinking again, I may possibly have used it with the Pentax 67 but I can't remember back that far :-) Nowadays I am using the SBIG STL-11K and it doesn't seem to be necessary. Many thanks Philip -- Philip Perkins <ppml3@...> Wiltshire UK & Luberon France www.astrocruise.com -- Note: the above email address may change in future. To find my latest email address please visit: www.astrocruise.com and click the "Send Email" link. -- |
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Re: AP155 EDF Field Flattener extension tube?
Roland Christen
In a message dated 6/13/2009 12:56:39 PM Central Daylight Time,
ppml3@... writes: Could someone please remind me of the purpose of the 3" extensionThis is only needed to bring the focuser tube inward so that it does not hang too far out. You're right, it is not needed with this setup. Rolando ************** Download the AOL Classifieds Toolbar for local deals at your fingertips. (http://toolbar.aol.com/aolclassifieds/download.html?ncid=emlcntusdown00000004) |
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Re: mounting plate advice
Brian Peterson
Kent,
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Yes, the flexing shows up in imaging, and I know that there are at least 163 places where that flex might be coming from. I wonder if the larger instruments that use dovetail attachments are stable because the whole length of the dovetail is attached to the scope, whereas with what I've got now the attachment is made though only one point on each ring. Brian --- In ap-gto@..., kgkirkley@... wrote:
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Re: mounting plate advice
Brian Peterson
Hi again Howard,
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Confused? Me?? Ok, maybe just a bit foggy. I actually would like the flexibility in balancing that the dovetail provides,and that's why I initially got the one I did. But at the moment, the rings are attached only at one point, which I suspect may be a bit of a flexing problem. Being able to secure the rings at 2 points seems much more stable, but the cost is "mounting" (pun, pun). Is there a picture anywhere of the LMDA adapters? How does one attach accessories / guide rings to them? Thanks for the advice. Brian
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Re: mounting plate advice
Hi again, Brian,
If you want to go the dovetail route, I would suggest our DOVELM162 saddle plate for Losmandy “D” series dovetail plates and a set of LMDAP6/7 plates with AP blocks (included) for each scope. The wider “D” series plates will have two attachment points for each ring. Again, you will want to be sure your rings have the AP hole pattern. If you are getting rings from Parallax, Joe will provide the AP hole pattern if requested. This setup would be solid as a rock. One possible advantage to using the 900RP or the FP1800 is that you can take advantage of the 13.75” spacing between the rings and mount your current DOVE15 and SB1500 on top as an accessory plate setup. It might be something to consider since you already own the 15” dovetail setup. Of course, using the DOVELM162 etc., you can also mount a second LMDAP6/7 on top of each set of rings and then use the LMDA adapters on top to hold accessories. Do I have you thoroughly confused yet? ;^) Mag. 7 skies! Howard Hedlund Astro-Physics, Inc. 815-282-1513 ________________________________ From: ap-gto@... [mailto:ap-gto@...] On Behalf Of ptolemy1959 Sent: Thursday, June 11, 2009 7:43 PM To: ap-gto@... Subject: [ap-gto] Re: mounting plate advice Kent, Thanks. Actually, I've been using the 15" Dovetail plate, but I've had a lot of differential flex. The rings I've been using are really cheap, and the problem may be there (and they're getting replaced too). But I've also wondered if the single attachment point between the rings and the dovetail plate is just not quite stable enough for this sized scope. Brian --- In ap-gto@... <mailto:ap-gto%40yahoogroups.com> , kgkirkley@... wrote:
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Re: mounting plate advice
Brian Peterson
Kent,
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Thanks. Actually, I've been using the 15" Dovetail plate, but I've had a lot of differential flex. The rings I've been using are really cheap, and the problem may be there (and they're getting replaced too). But I've also wondered if the single attachment point between the rings and the dovetail plate is just not quite stable enough for this sized scope. Brian --- In ap-gto@..., kgkirkley@... wrote:
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Re: mounting plate advice
Brian Peterson
Howard,
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Thanks for the quick reply! Brian --- In ap-gto@..., "Howard" <howard@...> wrote:
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Re: mounting plate advice
Hi Brian,
The 15" Ribbed Plate (900RP) or possibly the 18" Flat Plate (FP1800) would both work just fine. Be sure your rings have the AP hole pattern! Mag. 7 skies! Howard Hedlund Astro-Physics, Inc. 815-282-1513 ________________________________ From: ap-gto@... [mailto:ap-gto@...] On Behalf Of ptolemy1959 Sent: Thursday, June 11, 2009 6:19 PM To: ap-gto@... Subject: [ap-gto] mounting plate advice I have a AP900 mount, and I'm wondering if there is any guidance on what AP mounting plate is appropriate for a given weight / length scope. I've looked on the AP website, but I can't find any help there. I've got a 10" f/4 scope, about 35 pounds. I'd like to be able to use the same plate (though with different rings, of course) for a 12" scope, about 48" long and about 45 pounds. Will the 15" ribbed plate be ok? Thanks. Brian |
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mounting plate advice
Brian Peterson
I have a AP900 mount, and I'm wondering if there is any guidance on what AP mounting plate is appropriate for a given weight / length scope. I've looked on the AP website, but I can't find any help there. I've got a 10" f/4 scope, about 35 pounds. I'd like to be able to use the same plate (though with different rings, of course) for a 12" scope, about 48" long and about 45 pounds. Will the 15" ribbed plate be ok?
Thanks. Brian |
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Re: mounting plate advice
Kent Kirkley
In a message dated 6/11/09 7:43:01 PM, bpeterson@... writes:
Kent,Brian: So you are using the AP 15 inch saddle and a sliding bar? Of course that is possible.......but there are a lot of larger instruments using Losmandy based dovetail saddles and plates.....like 12.5, 14.5 and 16 inch RC's weighing well over 50 lbs. and they aren't flexing. How has the flexure been showing up....in imaging? If so, then that opens a whole 'Pandora's Box' of possible problems; ie. how are you guiding?, focuser flex?, cables draging, etc., etc. I will say this, I have found that a lot of rings are lined with materials which can cause movement. Some rings use verying thicknesses of felt or something similiar. Over time they compress allowing the tube to move. Kent Kirkley ************** Dell Deals: Don’t miss huge summer savings on popular laptops starting at $449. (http://pr.atwola.com/promoclk/100126575x1221770187x1201425153/aol?redir=http:%2F%2Fad.doubleclick.net%2Fclk%3B215566131%3B37864407%3B i) |
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Re: mounting plate advice
Kent Kirkley
In a message dated 6/11/09 6:46:21 PM, bpeterson@... writes:
Brian: Another possibility is to mount your rings on a dovetail plate which would then fit into a dovetail saddle on the mount. This arrangement allows you to slide the scope/rings assembly back and forth which makes balancing easier. AP has several very nice dovetail saddles which use the Losmandy dovetail plate system. Kent Kirkley ************** Dell Deals: Don’t miss huge summer savings on popular laptops starting at $449. (http://pr.atwola.com/promoclk/100126575x1221770187x1201425153/aol?redir=http:%2F%2Fad.doubleclick.net%2Fclk%3B215566131%3 B37864407%3Bi) [Non-text portions of this message have been removed] |
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Re: Abell 2151 Tony Hallas image
observe_m13
I don't know that there will be a list although there has been discussion about a dormant one which still exists. I am reading in something different to Roland's statement about a 'limited run'. I think he means that this will be a commission style project, most likely the same as done for Tony Hallas. Basically you contract for Roland to make the scope with a prepayment of some percentage for materials to start and a postpayment when the scope is complete. I could be completely wrong but best thing to do is call him and ask.
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--- In ap-gto@..., "rpyh77" <rpyh77@...> wrote:
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Re: Abell 2151 Tony Hallas image
rpyh77
I definitely want on the list for a 206. Where can I sign up? :)
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RP --- In ap-gto@..., chris1011@... wrote:
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