Availability Distribution News Notes & Interesting Articles Overview Pricing Products

• Slewing Your Mount In Below Freezing Temperatures. A one page text article providing advice about how to assure proper operation of the Astro-Physics Go To Mounts in cold weather down to -8 degrees F. Additional advice provided to facilitate operation in even colder environments, and explanation of their experiences using these mounts down to -80 degrees F. By Roland Christen Revised Dec 24, 2004. Download size is 58,365 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics Model PASILL3 Pole Finder Telescope Instructions. Six page illustrated article providing specifications for and explaining the installation and use of the PASILL3 Pole Finder Telescope as provided for the Astro-Physics Go-To computer controlled Mounts from 2002 to 2005. Revised Sept. 2002. Download size is 120,189 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics Model PASILL4 Pole Finder Telescope Instructions. Six page illustrated article providing specifications for and explaining the installation and use of the PASILL4 Pole Finder Telescope as provided for the Astro-Physics Go-To computer controlled Mounts since 2005. Revised Feb. 2006. Download size is 193,114 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics Mach1 GTO Mount Head Instruction Manual. Forty-two page illustrated manual provided with the more recent production Astro-Physics Mach1 GTO computer controlled German Equatorial Mount as equipped with the model GTOCP3 Control panel. Revised February 5, 2010. Download size is 2,260,537 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics Mach1 GTO Mount Head Instruction Manual. Twenty seven page illustrated manual provided with the original Astro-Physics Mach1 GTO computer controlled German Equatorial Mount as equipped with the model GTOCP3 Control panel. Revised September 21, 2006. Download size is 1,839,320 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics 900GTO Mount Head Instruction Manual. Thirty-six page illustrated manual provided with the more recent production Astro-Physics Model 900GTO computer controlled Mount Head as equipped with the model GTOCP3 Control panel. Revised August 11, 2009. Download size is 1,871,436 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics 900GTO Mount Head Instruction Manual. Twenty two page illustrated manual provided with the older production Astro-Physics Model 900GTO computer controlled Mount Head as equipped with the model GTOCP2 Control panel through 2002. Revised November 16, 2002. Download size is 1,472,391 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics 1200GTO Mount Head Instruction Manual. Twenty seven page illustrated manual provided with the more recent production Astro-Physics Model 1200GTO computer controlled Mount Head as redesigned in late 2004 and equipped with the model GTOCP3 Control panel. Revised January 8, 2010. Download size is 2,673,190 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics 1200GTO Mount Head Instruction Manual. Twenty seven page illustrated manual provided with the Astro-Physics Model 1200GTO computer controlled Mount Head as redesigned in late 2004 and equipped with the model GTOCP3 Control panel. Revised Feb 8, 2005. Download size is 2,673,190 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics 1200GTO Mount Head Instruction Manual. Forty-six page illustrated manual provided with the Astro-Physics Model 1200GTO computer controlled Mount Head as manufactured since April 2011, equipped with the model GTOCP3 Control panel. Revised June 24, 2011. Download size is 16,360,472 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics GTO Mount Head Keypad Instruction Manual: v4.12. One hundred four page illustrated manual provided with the Astro-Physics GTO control system Keypad with operating system version 4.12 as revised Feb 8, 2005. Download size is 1,841,243 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics GTO Mount Head Keypad Instruction Manual: v4.12 Addendum. Two page text document updating the above Astro-Physics GTO Mount Head Keypad Instruction Manual: v4.12. Revision provided March 5, 2005. Download size is 69,616 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics GTO Mount Head Keypad Instruction Manual: v4.17 Addendum. Ten page text document updating the above Astro-Physics GTO Mount Head Keypad Instruction Manual: v4.12. This also includes the illustrated "GTO Quick Star Drift Method of Polar Alignment Quick Reference Sheet", a valuable update for those whose systems are transportable. Revision provided September 22, 2010. Download size is 1,110,398 bytes (in Acrobat Reader ".pdf" format).

• Mount Head Dimension Calculator. a spreadsheet in Microsoft Excel format so that you may better determine what height of tripod or pier will work best for you with our Astro-Physics Mach1GTO, 900GTO, or 1200GTO mount at various latitudes. Particularly helpful for our customers who are planning an observatory. Of course feel free to contact Company Seven for advice about this too. Download size is 71,004 bytes (in Microsoft Excel ".xls" format).

• Mount Head Dimension Calculator. updated version of above - a spreadsheet in Microsoft Excel format so that you may better determine what height of tripod or pier will work best for you with our Astro-Physics mount. This adds the 1600GTO and 3600GTO mounts. Of course feel free to contact Company Seven for advice about this too. Download size is 463,872 bytes (in Microsoft Excel ".xls" format).

Astro-Physics Products Technical Drawings

• Astro-Physics 900GTO Mount Head Dimensions. Illustrated article providing the dimensions of the Astro-Physics Model 900GTO computer controlled Mount Head as redesigned in 2005. Please note that these dimensions will vary somewhat depending on your latitude and so we quote dimensions for the head when in the Polar Aligned orientation for operation at three latitudes: 20, 42 and at 68 degree. This article shows several dimensions that are commonly requested by those who are planning to build an observatory and who need to know the Pole Aligned variations in the horizontal distance from the center of the mount base plate to the center of the declination axis that are caused by different latitude settings and by typical "parked" positions of the mount. Revised Oct 4, 2005. Download size is 467,251 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics 1200GTO Mount Head Dimensions. Illustrated article providing the dimensions of the Astro-Physics Model 1200GTO computer controlled Mount Head as redesigned in late 2004; this will be similar for prior 1200GTO Mounts. Please note that these dimensions will vary somewhat depending on your latitude and so we quote dimensions for the head when in the Polar Aligned orientation for operation at three latitudes: 21.5, 42 and at 68 degree. This article shows several dimensions that are commonly requested by those who are planning to build an observatory and who need to know the Pole Aligned variations in the horizontal distance from the center of the mount base plate to the center of the declination axis that are caused by different latitude settings and by typical "parked" positions of the mount. Revised Aug 1, 2005. Download size is 581,356 bytes (in Acrobat Reader ".pdf" format).

Astro-Physics Electronics Support Files

• Astro-Physics Version "G" Mount Control RS-232 Command Language Protocol. Eight page text article explaining commands associated with the Astro-Physics Go-To computer controlled Mounts provided with the Model GTOCP3 Control Panel with Firmware "G" provided since June 2004. Very helpful for those considering writing their own software to control the Astro-Physics Go-To Computer Controlled Mounts from a personal computer. Effective Jun 30, 2005 edited Mar 5, 2005. Download size is 112,164 bytes (in Acrobat Reader ".pdf" format).

• Astro-Physics GTO Mount Control Panel RS-232 Port Pin Assignments. One page illustrated article explaining the Com Port DB-9 Serial Port Connector pin assignments as provided with the Astro-Physics Go-To mount control panels. Download size is 117,960 bytes (in Acrobat Reader ".pdf" format).

• CCD Autoguider Port RJ-11 Connector Pin Assignments. One page illustrated article explaining the CCD autoguider DB-9 Serial Port Connector pin assignments as provided with the Astro-Physics Go-To mount control panel.

• Control of The Astro-Physics GTO Systems. Eight page illustrated article explaining some of the ways by which you may control the Astro-Physics "GTO" Series Mounts either by the provided Keypad, by third party software on a personal computer, or even by Smart Phones. We urge our customers who own these mounts to read this article and to explore the links for the latest updates on these rapidly evolving technologies.