www.logwell.com

General Information
  Caliper Logging Overview
  Caliper History

Tool Information
  Line Driver Notes
  Downhole Low Voltage Power Supplies
  Casing Collar Locator (CCL)
  Cable Reheading Made Simple

Service Tips & Tricks
  A Word About O-Rings
  A Word About Tape
  A Word About RTV Silicones
  A Word About Solder
  A Word About Downhole Printed Circuit Board (PCB) Design
  Cleaning Secrets Revealed
    See Also Service Tips

Schematics and Printed Circuit Boards
  Schematics:
    Caliper Tool Schematics (pdf files)

  Printed Circuit Boards (PCBs):     PCB Details and Photographs
   Caliper Log Related Printed Circuit Boards (PCBs)