900 Upgrades & Parts

Astro-Physics

GTOCP4 Control Box for all GTO Mounts, except Mach2GTO, needs new 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 all GTO mounts. Serial # of mount required for purchase. (KEYVFK2))

The Keypad is a self-contained handheld computer that allows you to control all essential telescope

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

Astro-Physics

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

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

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"

Astro-Physics

22" x 1.875" Diameter Stainless Steel Counterweight Shaft - 1600, 1100, 1200 (all models), 900 (see exception). (M12601-E)

Like its predecessors, this 1.875" diameter counterweight shaft is precision machined from solid 303

Astro-Physics

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

5/16-24x1/2" Flat Point Set Screw to Use in Place of RA Clutch Knobs-900 Mounts (F0021)

If you operate your mount remotely and are concerned about cables snagging on the RA clutch knobs, y

Astro-Physics

8' Locking Power Cable with a locking connector for GTCOP1, GTOCP2, GTOCP3 (CABLPF)

Our 8' locking power cable is available as a spare part. Unfortunately, we cannot offer a longer pow

Astro-Physics

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

Astro-Physics

90-Degree Dovetail Adapter Plate for 900/1200 RA- mounted GTOCP4 (CBA912KIT)

If you wish to mount the GTOCP4 between the forks and use the original Y-cable supplied with the mou

Astro-Physics

900GTO Quick Release Control Box Adapter Kit - upgrade from GTOCP1 Control Box (9CBKIT)

If you are upgrading your 900GTO from the GTOCP1 and plan to attach the new control box to the RA ax

Astro-Physics

Adapter to attach Losmandy HD Tripod or Tripod with Losmandy MA Top to Astro-Physics 400, 600, 1100, 900, Mach1 and Mach2 Mounts (LT2APM)

This adapter allows owners of all 400, 600E, 900, 1100, Mach1 and Mach2GTO mounts (cannot be u

Astro-Physics

Altitude Adjuster Assembly for 900 Mount, all models (9ALKIT)

Individuals who own the very earliest 900 mounts may want to consider upgrading to this more substan

Astro-Physics

Altitude Adjuster Brace for 900 Mount, all models (9ALBKIT)

If you do not wish to replace the entire Altitude Adjuster Assembly with 9ALKIT, you may wish to con

Astro-Physics

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

Astro-Physics

Cover for Back of RA Axis for 900GTO Mounts shipped since October 2005 (M9403)

This sight hole cover threads onto the back of all 900GTO mounts shipped since October 2005. The rea

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

Astro-Physics

Flat Surface Adapter -attach 1100 Mount or 900 Pier Adapter and Wedge to a flat surface (119FSA)

In late 2012, the Flat Surface Adapter (formerly part # 900FSA) was upgraded to include four additio

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

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 &l

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

Polar Scope Cover for 900GTO Mounts shipped since October 2005 (Q9700)

These covers allow you to keep your Polar Alignment Scope protected while remaining threaded in your

Astro-Physics/Powerwerx

Power Cables for GTOCP4

The power cable for the GTOCP4 can purchased as a set or the individual parts can be purchased separ

Astro-Physics

Replacement for 900/1200 Dovetail Knob (DOVEKREP)

Astro-Physics

Y-Cable for 900GTO Mount -for Pier-mounted GTOCP4, GTOCP3 or GTOCP2 Control Boxes (SGYCR2345)

We recommend this cable if have a 900GTO and your GTOCP4 is mounted on the Control Box Adapter (CBAP

Astro-Physics

Y-Cable for 900GTO Mount with GTOCP4, GTOCP3 or GTOCP2 Control Boxes that are mounted on the RA housing (S900GYCR)

If you are upgrading your 900GTO from the GTOCP1 Control Box and plan to mount the control box on th