Peterson Engineering Buck's Big Scope Tune-Up for 14" Meade LX600 and LX200 ACF/R/GPS and Meade 10", 12" and 14" RCX400 telescopes

Article number: BDTU14
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Buck's Big Scope Tune-Up
for 14" Meade LX600 and LX200 ACF/R/GPS
and Meade  10", 12" and 14" RCX400 telescopes


This upgrade is intended for  scopes manufactured after August 2005 when Meade started using precision brass transfer gears in the drive train.   The upgrade is actually a Buck's "Big Scope" Gears kit without the gears!  

About 50% of the of the improvement associated with Buck's Gears is due to the precision gears themselves.  And the newer scopes that Meade has been shipping with precision brass transfer gears (in place of plastic gears) have effected this same improvement.   The remaining 50% of the Buck's Gears kit improvement is what you achieve with Buck's Drive Tune-Up.

This tune-up kit further increases the precision of your drives through a series of adjustments that Meade's assembly line did not take the time to optimize or simply cannot make.  No one step will take your scope all the way to 1 or 2 arc-second tracking performance, but this tune-up is the largest single mechanical step that you can take in this direction.

Installation of this kit will:

1)  improve the drive precision in both RA and DEC drives, reducing or eliminating transfer gear backlash. 

 2) correct other misaligned drive components, improving drive precision and eliminating the chance of incurring drive damage due to this misalignment.

3)  If installed before the scope sees much use - allows you to detect conditions where extended use will seriously damage the scope, rendering the drive/drives inaccurate.  We're always hearing back from folks who've discovered loose screws or stripped screws, extra pieces of metal floating around in the gear grease, gears that are only cogging (touching tip of tooth to tip of tooth) instead of meshing, drives that are misadjusted, etc.    

The kit consists of detailed step-by-step photo illustrated instructions for the declination and the azimuth drives, plus special gear grease, wrenches and parts to correct those scopes where the gears do not mesh closely but are only touching tooth tip to tooth tip in a cogging kind of action.


The late Buck Harley developed the first precision metal transfer gears and worked out most of the development problems strictly on his own for the good of the astronomical community.  He offered his gear design to PE Corp. with no compensation to himself simply because of our distribution ability and our experience with this type of a kit.  This Drive Tune-Up kit encompasses the tune up knowledge that Buck and Peterson Engineering picked up while developing the gears.

Although the instructions provided are crystal clear, this tune-up is slightly more complex than the installation of the EZ Focus kit or the EZ Clutch kit.  If you had trouble with either of our other kits, or if you consider yourself to be a klutz, please either do not buy this kit or arrange for someone else to perform the tune-up for you.  

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