www.logwell.com

General Information
  High Voltage Regulators (Replace the Victoreen Corotron)
  Printed Circuit Boards (PCBs)
  Shipping Tips
  Well Logging Equipment Photographs
  A Brief History of Logging Equipment Manufacturers

Tool Information
  A Word About O-Rings
  High Count Rates
  Anti-Coincidence Considerations
  High Voltage Woes
  High Voltage Tips & Tricks
  GO/MLS COSMOS Tool Notes
  Gamma Ray Scintillation Detector Calibration
  Neutron Tool Calibration
  Cable Reheading Made Simple
  Single Conductor Logging Cable (Electric Wireline) Data
  See Also Casing Collar Locator (CCL)

Wire, Tubing and Connectors
  Teflon Wire Trivia
  Teflon Tubing Trivia
  MS Cylindrical Connector Trivia
  Downhole Wiring Color Codes and Tool Connector Pinouts

Components and Materials
  Printed Circuit Boards (PCBs)
  Logging Equipment Op Amps (Or How I Learned to Love the CA3140)
  AnaLog's Photomultiplier Tube (PMT) List
  SIE Transformer Identification
  Downhole Plastics, Composites, and Ceramics
  Potter & Brumfield SL11DB, etc. Relays (pdf file)
  SL11DA, SL11DB, SL11DC, SL11DD and SC Series Catalog Page
  Old Victoreen Tubes Catalog (large pdf file)
  Including Corotron High Voltage Regulators

Service Tips & Tricks
  A Word About O-Rings
  A Word About Tape
  A Word About RTV Silicones
  A Word About Solder
  Cleaning Secrets Revealed
  See Also Service Tips

Schematics
  Shooting CCL (pdf file)
  Dummy Lines (pdf files)
  Bond Kill Circuits (pdf files)
  Line Driver Circuits (pdf files)
  Radiation Tool Preamps (pdf files)
  Anti-Coincidence Circuits (pdf files)
  Dual Fire Perforator Wiring (pdf file)
  Bond Receiver Amp Circuits (pdf files)
  Downhole Logging CCL Amps (pdf files)
  GO/GOI/MLS COSMOS Tool Schematics (pdf files)