Mount Upgrades & Parts

Astro-Physics

GTOCP4 Control Box for all GTO Mounts, except Mach2GTO. Order new 2-Pin power cable (GTOCP4)

All GTO mounts(except the Mach2GTO) produced since 1998 can be easily upgraded!!! The GTOCP4 Up

Astro-Physics

GTO Keypad with Keypad Protector - for GTOCP1, GTOCP2 and GTOCP3 Control Boxes. Serial # of mount required for purchase. (KEYVFK)

This Keypad should only be purchased for use with the GTOCP1, GTOCP2 and GTOCP3 control boxes. This

Astro-Physics

GTO Keypad with Keypad Protector for GTOCP4 and GTOCP5 Control Boxes. Serial # of mount required for purchase. (KEYVFK2)

This Keypad should only be purchased for use with the GTOCP4 and GTOCP5 control boxes with version P

Astro-Physics

Absolute Encoder Kit for 1600GTO - Extended Temperature (16AE-4L-KIT)

The photo above shows the 1100GTO with either version of the absolute encoders installed - standard

Astro-Physics

Absolute Encoder Kit for 1600GTO - Standard Temperature (16AE-4-KIT)

The photo above shows the 1100GTO with either version of the absolute encoders installed - standard

Astro-Physics

Absolute Encoder Kit for 1100GTO - Extended Temperature (11AE-4L-KIT)

The photo above shows the 1100GTO with either version of the absolute encoders installed - standard

Astro-Physics

Absolute Encoder Kit for 1100GTO - Standard Temperature (11AE-4-KIT)

The photo above shows the 1100GTO with either version of the absolute encoders installed - standard

Astro-Physics

Right-Angle Polar Alignment Scope Adapter for Mach1GTO Mounts (RAPM1)

Note: This adapter is not needed for the Mach1GTO mounts shipped beginning in 2014 (serial number M1

Astro-Physics

Right-Angle Polar Alignment Scope Adapter for 1200GTO Mounts (RAP1200)

Our Right-Angle Polar Alignment Scope can be used with the Mach1GTO and all 900 and 1200 mounts (exc

Astro-Physics

Right-Angle Polar Alignment Scope Adapter for 900GTO Mounts (RAP900)

Special note regarding a select few 900 mounts:      Please check this linked photo t

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Threaded Cap for Right-Angle Polar Scope Adapter (M16106-A)

We are making this cap available separately as a spare in case you lose the one included with the Ri

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EPROM Microcontroller Chip w/ V2 Version Firmware for GTOCP3 Control Box, Extraction Tool (CHIPKITV2)

If you already own the GTOCP3 control box, you may wish to consider upgrading the ROM chip to take a

Standard Pier Adapter for 1200 Mount, Fits 10" Astro-Physics Piers (1200SPA)

The 1200SPA is a replacement for your 1200 Standard Pier Adapter if yours is damaged. The base is 9.

Astro-Physics

Flat Surface Adapter with Flat Pier Plate - for Mach2, Mach1, 600E and 400 Mounts to use 8" Astro-Physics Portable Piers (ADATRI-8FP)

Ever find yourself wishing that you had a bigger mount? Short of a magical spell, you can maximize t

Astro-Physics

Flat Surface Adapter with Flat Pier Plate - for 1100 and 900 Mounts to use 10" ATS Piers (119FSA-10ATS)

Ever find yourself wishing that you had a bigger mount? Short of a magical spell, you can maximize t

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Pier Adapter Knob Kit for 900 Mounts (9KBKIT)

This kit contains four machined and black-anodized Pier Adapter Knobs and 1/4"ID x 1"OD flat washers

Astro-Physics

Flat Surface Adapter with Flat Pier Plate - for Mach2, Mach1, 600E and 400 Mounts to use 8" ATS Piers (ADATRI-8ATS)

Ever find yourself wishing that you had a bigger mount? Short of a magical spell, you can maximize t

Astro-Physics

Standard Pier Adapter for 900 Mount, Fits 8" Astro-Physics Piers (900SPA)

The 900SPA is a replacement for your 900 Standard Pier Adapter if yours is damaged. The base is 7.73

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Counterweight Shaft Adapter with Aluminum Bronze Insert for Mach1GTO Mounts shipped since July 2014 (SM1CSA)

If your Mach1GTO mount is is frequently used as a portable mount, you may wish to consider upgrading

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1600GTO Counterweight Shaft Adapter with Aluminum Bronze Insert (S1600CSA)

If your 1600GTO mount is is frequently used as a portable mount, you may wish to consider upgrading

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1200GTO Counterweight Shaft Adapter with Aluminum Bronze Insert (S1200CSA)

If your 1200 is frequently used as a portable mount, you may wish to consider upgrading to this coun

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Counterweight Shaft Adapter with Aluminum Bronze Insert for 900 Mounts (see exception) and Mach1GTO Mounts shipped before July 2014 (S900CSA)

If your 900 is frequently used as a portable mount, you may wish to consider upgrading to this count

Astro-Physics

1100GTO Counterweight Shaft Adapter with Aluminum Bronze Insert (S1100CSA)

If your 1100GTO mount is is frequently used as a portable mount, you may wish to consider upgrading

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22" Mach2GTO RA/Dec Cable from Backplate to GTOCP5 (CABM2RD22)

This custom cable will provide an additional 6.5" of length than the standard R.A. and Dec. cables t

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13.7" x 1.875" Diameter Counterweight Shaft, Stainless Steel (M2043)

This shaft has a usable length of 13.7" and is designed to be used with our 5 lb. (5SCWT), 10 l

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Counterweight Shaft Safety Stop, One-Piece, Washerless (M12676)

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9.25" x 1.875" Diameter Counterweight Shaft Extension, Stainless Steel (M12675)

The 8.5" Counterweight Shaft Extension completes the current 1.875" diameter counterweight shaft ens

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14.5" x 1.125" Diameter Counterweight Shaft, Stainless Steel (M8084-B)

This is the standard shaft that is shipped with the Mach1GTO. It is the same diameter - 1.125" - and

Astro-Physics

Y-Cable for Mach1GTO Mount (SM1GYCR)

It is always a good idea to have a backup Y-cable for your mount. This is particularly true for any

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Mach1GTO Precision-Adjust Rotating Base/ Hi-Res Azimuth Adjuster Upgrade Kit (M1RAUP)

The Mach1GTO Precision-Adjust Rotating Pier Base / Hi-Res Azimuth Adjuster is standard on new mounts

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37" Dec Cable for GTOCP1 and SMDCP1 Control Boxes of 1200GTO or SMD, 900GTO or SMD (SRDC37)

This 37" replacement cable is available if you damage or lose yours. Mounts that can use this cable:

Astro-Physics

12" RA Cable for GTOCP1 and SMDCP1 Control Boxes of 1200GTO or SMD, 900GTO or SMD (SRDC12)

This 12" replacement cable is available if you damage or lose yours. Mounts that can use this cable:

Astro-Physics

3600GTO Cable to Connect Limit Switch Connector on Cable Port Plate to GTOELS (CAB36LS)

This cable is needed if you plan to control your Limit Switches with the GTOELS Control Box.

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Limit Switch System for 3600GTO, requires GTOCP4 (36LSS)

Optional switches can be installed to control operation past the meridian and for homing. The Limit/

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Y-Cable w/42" Declination Length for 1100 Quick Release Servo Box (S1100GYCR42)

This is a custom cable for the 1100GTO (without Absolute Encoders) that is used when setting up the

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Machined Safety Stop Knob. 5/16"-18 thread - For 1.125" Diameter Counterweight Shafts. (MSSKB)

You asked for it … now we’ve got it! The Mach1GTO’s counterweight shaft is now &

Astro-Physics

Polar Alignment Scope Plug Adapter (M4037)

This adapter threads into the rear of the right ascension axis of the mounts specified below to allo

Astro-Physics

Flat Surface Adapter with Flat Pier Plate - 1100GTO and all 900 Mounts - for 8" ATS and other non-Astro-Physics piers (119FSA-FP)

If you are ordering a 8" ATS pier for your 1100GTO, you will need to order this adapter to interface

Astro-Physics

Flat Pier Plate for 1100GTO and all 900 Mounts - for 8" ATS and other non-Astro-Physics Piers (119FP)

This Flat Pier Plate (119FP) has been machined to the specifications of the Advanced Telescope Syste

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16.975" x 1.875" Diameter Counterweight Shaft , Stainless Steel- 1100, Mach2, Mach1, 1200, 900 (see exception) (M9404-B)

This is the current shaft for 1100 and 900 mounts. It can also be used as an optional "heavyweight"