As time goes on, this page will outline a variety of options and spare parts for the 1600GTO German Equatorial Mount.

1600GTO
The base of the 1600GTO slips directly into the 1612FSA. There is no need for an extra pier adapter, as the 1600 incorporates the functionality of the Precision-Rotating Pier Adapter into its base. The extended latitude range of the 1600 also eliminates the need of a polar wedge.

1200 (all versions)
Use this adapter for these applications:

• Interface between the Precision-Adjust Rotating Pier Adapter (1200RPA) and the flat plate on your custom made pier or tripod.
• Attach to the top of your 1200 Hi-Lo Latitude Wedge (1200WDG) if you wish to use the 1200RPA.
• Although the Standard Pier Adapter (1200SPA) can bolt directly onto the flat plate of your pier or tripod, you can use this adapter to give a more finished appearance.

The 1612 Flat Surface Adapter is black-anodized, precision-machined aluminum.

Attach to flat surface
The Flat Surface Adapter bolts onto the flat surface on the top of your pier or tripod. Your pier's top plate should be a minimum of 9.75" in diameter. The 1612FSA itself is 10.345" in diameter. It adds 1.265" to the height of your mount.

The bolt circle for attaching the 1200 Flat Surface Adapter to your pier is 9.230" in diameter. Please refer to the PDF link provided on the diagram to the right for detailed information on attachment preparation.

The holes for mounting the 1612FSA to your flat surface are counter-bored to accept the head of standard ¼" socket head cap screws (13/32" or 0.406" diameter). This allows the 1600 base or 1200 Pier Adapter to sit in the Flat Surface Adapter without interference. Because installations will vary, we do not provide the screws for mounting the Flat Surface Adapter to your pier or tripod.

Attach to 1200 Hi-Lo Latitude Wedge
Match four holes and bolt the 1612FSA in place. Then, your Pier Adapter simply slips in (just as it fits into our pier) and you fasten from the side with the six screws and washers provided with the Pier Adapter for your 1200 mount.

Fasteners are not supplied.

Pier options:

• Use with the 10" ATS pier (no modification required)
  The base of the 1612FP has already been machined per the specifications provided by ATS to fit into their piers without further modification.

• Use with other piers (may require custom modification)
  Machine the bottom portion of this plate to fit the I.D. of your pier, if necessary. Please refer to the diagram to determine if your pier is suitable.

Top attachment options:

• Attach 10" 1612FSA (use existing tapped holes)

• Attach 8" 119FSA (use existing tapped holes)

• Attach custom  mount adapter (machine custom tapped holes)

If you intend to attach an 1600GTO or older 1200 mount to the ATS pier, then it is best to choose the combination Flat Surface Adapter with Flat Pier Plate (1612FSA-FP).  It is a two-part adapter that combines both the 1612FSA and the 1612FP. 

Fasteners included:
1/4-20 x 3/4" (8) - attaches 1612FSA or 119FSA to Flat Pier Plate (1612FP)
5/16-18 x 5/8" (6) and washers - attaches 1612FP to ATS pier

Note:  Since the bottom of the flat plate is designed to fit into the 10" ATS Piers, the diameter (9.450") is too small to be used in the Astro-Physics 10" Portable Piers.

Use with 10" ATS Piers and 1600GTO

• The base of the 1612FSA-FP has already been machined per the specifications provided by ATS to fit into their piers without further modification. The 1600GTO will fit directly into the top portion of the 1612FSA-FP.

Use for Other Piers and 1600GTO

• Machine the bottom portion of this plate to fit the I.D. of your pier. The base of the 1600GTO will fit directly into the top portion of the 1612FSA-FP.
• The Particle Wave Monolith will receive this adapter directly, provided that it has the reported 9.50" inner diameter specification.

Use for Other Piers and 1200 Mounts

• Machine the bottom portion of this plate to fit the I.D. of your pier. Please refer to the diagram to determine if your pier is suitable.
• These adapters for the 1200GTO will fit into the top portion: Precision-Adjust Rotating Pier Adapter (1200RPA), Standard Pier Adapter (1200SPA), or 1200 Hi-Lo Latitude Wedge (1200WDG or 1200WDGA).

Fasteners are supplied for attaching the 1612FSA-FP to ATS or other similar pier.