www.logwell.com

Additions, updates, changes, and corrections to www.logwell.com are listed here; very minor changes and corrections are usually omitted for page space economy.  Also check What's New for announcements and press releases.  See our Subject Index, Page Title Index, and Search Page, in addition to the conventional navigation bars at the bottom of all pages, to navigate this website and find what you seek.  Finally, visit our Navigation Tips if you are new to "surfing".

01-01-2010
Created 2009 ModLog Archive.
Updated copyright notices.
Changes to Schematic / PCB List.

01-02-2010
Revised 106LD7.sch (pdf schematic).

01-05-2010
Revised 106LD3.sch (pdf schematic).

01-12-2010
Revised 106PD3.sch (pdf schematic).

01-15-2010
Revised 106DR2.sch (pdf schematic).

01-16-2010
Revised 106CCL1.sch (pdf schematic).

01-17-2010
Revised 106LVPS3.sch (pdf schematic).

01-18-2010
Added A Word About Downhole PCB Design.
Changes to Schematics (menu).
Changes to Service Tips (menu).
Changes to Caliper Logging (menu).
Changes to Nuclear Logging (menu).
Changes to High Temperature (menu).
Changes to Downhole Hardware (menu).
Changes to Temperature Logging (menu).
Changes to Cement Bond Logging (menu).
Changes to Casing Collar Locator (CCL) (menu).
Changes to Printed Circuit Boards (PCBs) (menu).
Changes to PCB Details and Photographs (menu).
Changes to Electronic Component ID and Data Menu.
Changes to Application Notes.

01-19-2010
Revised 106CCL3.sch (pdf schematic).

01-21-2010
Revised 106LVPS1.sch (pdf schematic).
Revised 106LVPS2.sch (pdf schematic).

01-22-2010
Revised 106LD4.sch (pdf schematic).

01-23-2010
Revised 106AC1.sch (pdf schematic).

01-26-2010
Revised 106BK2.sch (pdf schematic).
Revised CBLUBK4.sch (pdf schematic).

01-28-2010
Revised CBLAmp1.sch (pdf schematic).

02-01-2010
New country visiting in January:  Sierra Leone.
Revised 106LD5.sch (pdf schematic).

02-04-2010
Revised 106CCL4.sch (pdf schematic).
Changes to List of Loggers.

02-05-2010
Revised 106PD4.sch (pdf schematic).
Revised 106GMP1.sch (pdf schematic).

02-07-2010
Revised 106PD1.sch (pdf schematic).

02-11-2010
Revised 106HVPS6.sch (pdf schematic).
Revised VFC2e.sch (pdf schematic).

02-22-2010
Added 106LD-7 Compact Single Xistor Line Driver PCB.
Changes to PCB Details and Photographs (menu).
Changes to Casing Collar Locator (CCL) PCBs (submenu).
Changes to Cement Bond Log Related PCBs (submenu).
Changes to Temperature Log Related PCBs (submenu).
Changes to High Voltage Related PCBs (submenu).
Changes to Caliper Log Related PCBs (submenu).
Changes to 106 Radiation Tool PCBs (submenu).
Changes to Schematic / PCB List.
Changes to A Word About Downhole PCB Design.

03-01-2010
Changes to VFC-2 Voltage to Frequency Converter PCB.
Changes to VFC-3 Voltage to Frequency Converter PCB.
Changes to 106AC-1 Anti-Coincidence PCB.
Changes to 106BK-2 Bond Kill PCB.
Changes to 106CCL-1 or CCL-2a DH CCL Amplifier PCB.
Changes to 106CCL-3 Downhole CCL Amplifier PCB.
Changes to 106CCL-4 Downhole CCL Amplifier PCB.
Changes to 106DR-1 or 106DR-2 Divide-By Circuit PCB.
Changes to 106GMP-1 Geiger-Müeller Tube Preamp PCB.
Changes to 106HVPS-5 High Voltage Power Supply PCB.
Changes to 106HVPS-6 SCR HV Power Supply PCB.
Changes to 106LD-3 Dual Channel Pulse Former/LD PCB.
Changes to 106LD-4 Dual Channel Bare Bones LD PCB.
Changes to 106LD-5 One Channel Pulse Former/LD PCB.
Changes to 106LD-7 Compact One Xistor LD PCB.

03-02-2010
Changes to 106LVPS-1, 106LVPS-2, or 106LVPS-3 PCB.
Changes to 106PD-1 Non-Invt. Preamp and Discrim. PCB.
Changes to 106PD-3 Inverting. Preamp and Discrim. PCB.
Changes to 106PD-4 Invt. Preamp and DC Discrim. PCB.
Changes to BAMP-1 or 4091 CBT Amplifier PCB.
Changes to UBK-4 Universal Bond Kill PCB.

03-05-2010
Revised VFC3.sch (pdf schematic).
Revised 106HVF1.sch (pdf schematic).
Revised 106HVM1.sch (pdf schematic).
Changes to 106HVM-1 or 2 HV Multiplier PCB.
Changes to 106HVF-1 High Voltage Filter PCB.

03-20-2010
Changes to Radioactive Cheat Sheet.
Changes to Surplus (Cheap) Electronics.
Changes to The Sealed Source Exchange.

03-22-2010
Revised 106PMT3.sch (pdf schematic).
Revised 106PMT3A.sch (pdf schematic).
Updated Repair Vacuum Tube (Valve) Stock.

03-25-2010
Added Radiation Related Labels and Signs.
Changes to Nuclear Logging (menu).
Changes to Regulatory Matters (menu).
Changes to Explosives and Radiation Safety (menu).

03-27-2010
Changes to What's New.
Changes to AnaLog Links.
Changes to Caliper Logging (menu).
Changes to Downhole Hardware (menu).
Changes to Surface Well Logging Equipment Sales.
Changes to New Downhole Well Logging Tool Sales.

04-01-2010
New country visiting in March:  Libya.

04-05-2010
Revised 106AC5b.sch (pdf schematic).
Changes to Ceramic Capacitors.

04-10-2010
Added Eagle CAD Zipped File Package.
Changes to AnaLog Home Page (v11.3).
Changes to Downloads.
Changes to AnaLog Site Map.
Changes to Tools and Stuff We Like.
Changes to A Word About Downhole PCB Design.

04-13-2010
Changes to A Word About Downhole PCB Design.

04-23-2010
Revised 106PMT1.sch (pdf schematic).
Revised 106PMT1A.sch (pdf schematic).

05-01-2010
New country visiting in April:  Burundi.
Added Sample PCB "Read_Me" File.
Revised 106PMT2.sch (pdf schematic).
Revised 106PMT2A.sch (pdf schematic).
Changes to A Word About Downhole PCB Design.

05-10-2010
Added 106AC1b.sch (pdf schematic).
Changes to GO/MLS COSMOS Schematics (submenu).
Changes to High Voltage Related PCBs (submenu).
Changes to 106 Radiation Tool PCBs (submenu).
Changes to Schematic / PCB List.
Changes to Sample PCB "Read_Me" File.
Changes to 106AC-1 Anti-Coincidence PCB.
Changes to 106PMT-1, 2, 3, 4 PMT Voltage Divider PCB.

05-11-2010
Revised 106PMT3.sch (pdf schematic).
Revised 106PMT3A.sch (pdf schematic).
Revised 106PMT4.sch (pdf schematic).
Revised 106PMT4A.sch (pdf schematic).

05-20-2019
Revised 106HVF1c.sch (pdf schematic).
Revised 106HVPS5d.sch (pdf schematic).
Revised 106HVRF1c.sch (pdf schematic).
Changes to 106 Radiation Tool PCBs (submenu).
Changes to High Voltage Related PCBs (submenu).
Changes to Eagle CAD Zipped File Package.
Changes to Sample PCB "Read_Me" File.
Changes to Schematic / PCB List.

05-24-2010
Revised CCL-NCB.sch (pdf schematic).
Changes to Casing Collar Locator (CCL) PCBs (submenu).

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