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Click on links in the first column to see schematics.  Click on links in the second column, "PCB", for photos and additional data on available printed circuit Boards (PCBs).

The schematics listed below are pdf files.  The Adobe Acrobat Reader is free and available by clicking the link below (if you are unfamiliar with pdf files, try clicking on a schematic first since the reader may already be installed on your machine).  The schematics may take from a few seconds to a minute or two to load, depending on connection speed.

  106 File
106AC1.sch
106AC2.sch
106AC3.sch
106AC5a.sch
106AC5b.sch
106AC6.sch
106BK2.sch
106CCL1.sch
106CCL3.sch
106CCL4.sch
106DB1.sch
106DR1.sch
106DR2.sch
106GMP1.sch
106HVF1.sch
106HVF1c.sch
106HVM1.sch
106HVM2.sch
106HVPS5c.sch
106HVPS6.sch
106HVPS7a.sch
106HVPS7b.sch
106HVRF1.sch
106HVRF1c.sch
106HVRF2.sch
106LD3.sch
106LD3n.sch
106LD4.sch
106LD5.sch
106LD6a.sch
106LD6b.sch
106LD7.sch
106LVPS1.sch
106LVPS2.sch
106LVPS3.sch
106PD1.sch
106PD3.sch
106PD4.sch
106PMT1.sch
106PMT1A.sch
106PMT2.sch
106PMT2A.sch
106PMT3.sch
106PMT3A.sch
106PMT4.sch
106PMT4A.sch
106PP1.sch

  CAL File
CALM1.sch
CALM2.sch

  CBL File
CBLAmp1.sch
CBLBK3.sch
CBLCAL1.sch
CBLCAL2.sch
CBLF1.sch
CBLUBK4.sch

  CCL File
CCL-2a.sch
CCL-NCB.sch
CCLB2a.sch
CCLF1.sch
CCLM1a.sch
CCLM2a.sch
CCLSIEa.pdf
CCLSTa.sch

  DH File
DHAC1.sch
DHCCb.sch
DHLD1.sch
DHLD2.sch
DHLVPS1.sch
DHPDD1.sch
DHSW1.sch
DHSW2.sch
DHSW3.sch
DHSW4.sch
DHSW5.sch
DHULD1.sch

  EXP File
EXPCM1.sch
EXPDF1.sch
EXPSB1.sch

  GO File
GOCCL-2a.sch
GOPS-2a.sch
GOGRP1.sch
GOGRP2.sch

  SE File
SEDLa.sch
SEROA1.sch
SESE1.sch

  TE File
TECTB1.sch
TESDLa.sch

  VFC File
VFC1.sch
VFC2a.sch
VFC2b.sch
VFC2d.sch
VFC2e.sch
VFC2n.sch
VFC3.sch
VFC3n.sch

     File
COSMOS.pdf
One_Tube.html

   PCB
106AC-1
106AC-2
106AC-3
N/A
106AC-5
106AC-6
106BK-2
106CCL-1
106CCL-3
106CCL-4
106DB-1
106DR-1
106DR-2
106GMP-1
106HVF-1
106HVF-1
106HVM-1
106HVM-2
106HVPS-5
106HVPS-6
N/A
N/A
106HVRF-1
106HVRF-1
106HVRF-2
106LD-3
106LD-3
106LD-4
106LD-5
106LD-6
106LD-6
106LD-7
106LVPS-1
106LVPS-2
106LVPS-3
106PD-1
106PD-3
106PD-4
106PMT-1
106PMT-1
106PMT-2
106PMT-2
106PMT-3
106PMT-3
106PMT-4
106PMT-4
106PP-1

   PCB
CALM-1
CALM-2

   PCB
BAMP-1
N/A
BCAL-1
BCAL-2
CBLF-1
UBK-4

   PCB
CCL-2
CCL-NCB
CCLB-3
CCLF-1
CCLM-1
N/A
N/A
N/A

   PCB
N/A
N/A
N/A
N/A
N/A
N/A
DHSW-1
DHSW-2
DHSW-3
DHSW-4
DHSW-5
N/A

   PCB
N/A
N/A
N/A

  PCB
CCL-2a /
PS-2a
N/A
N/A

  PCB
N/A
SEROA-1
SESE-1a

  PCB
N/A
N/A

  PCB
VFC-1
VFC-2
VFC-2
VFC-2
VFC-2
VFC-2
VFC-3
VFC-3

      106 Radiation Tool Schematics
Anti-Coincidence Circuit  GO COSMOS Style
Anti-Coincidence Circuit  Tek-Co Style
Anti-Coincidence Circuit  Robert Baer's Ingenious Circuit
Anti-Coincidence Circuit  GO X-Y Caliper Style
Anti-Coincidence Circuit  GO X-Y Caliper Style
Anti-Coincidence Circuit  Late Model GO X-Y Caliper Style
Bond Kill Circuit
TIP-120 Style Downhole CCL Amplifier  [After Comprobe]
Small GO Style Downhole CCL Amplifier  [Cascode Design]
SIE Style Downhole CCL Amplifier  [2N2102 / 2N3439]
Pulse Doubler / Former  Bond Kill Ready
Pulse Divider  4013 Version
Pulse Divider  4528 Version with Anti-Collision Protection and Bond Kill Ready
G-M Tube Gamma Ray Preamp  [GO COSMOS Style]
High Voltage Filter
High Voltage Filter  [Dual Capacitor Version]
High Voltage Multiplier  106HVPS-5 / 106HVPS-6 Voltage Doubler
High Voltage Multiplier  106HVPS-5 Voltage Quadrupler
High Voltage Supply  Taylor Brothers Variant / Codatron HV Regulator Supply
High Voltage Supply  Comprobe / GOI Nuvistor Tool SCR Variant
High Voltage Supply  Comprobe / GOI Nuvistor Tool SCR Variant (Single HV Diode)
High Voltage Supply  Comprobe / GOI Nuvistor Tool SCR Variant (Double HV Diode)
High Voltage Regulator / Filter
High Voltage Regulator / Filter  [Dual Capacitor Version]
High Voltage Neon Circuit
Pulse Former / Line Driver  Dual Channel - Bond Kill Ready
Pulse Former / Line Driver  Dual Channel - Bond Kill Ready [Slim Tool}
Line Driver  [Bare Bones]
Pulse Former / Line Driver  Single Channel (Anti-Collision Protected) - Bond Kill Ready
Line Driver  Dual Channel / Single Channel GO COSMOS Discrete Component Style
Line Driver  Dual Channel / Single Channel GO COSMOS Discrete Component Style
Line Driver  Single Channel Single Transistor Tek-Co Discrete Component Style
Temp. Compensated Low Voltage Power Supply  Forward Junction Compensated
Temp. Compensated Low Voltage Power Supply  Three Zener Version
106 Radiation / Temperature Tool Low Voltage Power Supply  [Also Slim Tool]
Non-Inverting Preamp / Discriminator  [He-3 or PMT]
Inverting Preamp / Discriminator
Inverting Preamp / Simple DC Bias Discriminator
PMT Voltage Divider (3/4 Inch Hard Pin Tubes - 2 Wire)
PMT Voltage Divider (3/4 Inch Hard Pin Tubes - 3 Wire)
PMT Voltage Divider (3/4 Inch Flying Lead Tubes - 2 Wire)
PMT Voltage Divider (3/4 Inch Flying Lead Tubes - 3 Wire)
PMT Voltage Divider (1-1/8" Hard Pin Tubes - 2 Wire)  GO COSMOS Style
PMT Voltage Divider (1-1/8" Hard Pin Tubes - 3 Wire)
PMT Voltage Divider (1" Flying Lead Tubes - 2 Wire)
PMT Voltage Divider (1" Inch Flying Lead Tubes - 3 Wire)
Pea Pickin' Pulse Picker

      Caliper Series Schematics
Caliper Tool Relayless Motor Control  GO / WR, Etc. Retrofit
Caliper Tool Motor Control  GO / GOI / WR Relay Version

      Cement Bond Log Series Schematics
SIE Bond Receiver Amplifier
Bond Kill Circuit  Bell Style
CBT Sine Wave Calibration Circuit  Ringing Inductor Decaying Sine Wave Output
CBT Pulse Calibration Circuit  CRC / Western Style Improved Pulse Output
Improved SIE Bond Panel Output Filter  Unity Gain Sallen-Key Low Pass Active Filter
Universal Bond Kill

      Casing Collar Locator Series Schematics
TIP-120 Style Downhole CCL Amplifier  [After Comprobe]
TIP-120 Style Downhole CCL Amplifier  [Slim Tool - After Comprobe]
CCL Beeper
Improved CCL Low Pass Filter  Second Order VCVS Equal Value Sallen-Key Filter
CCL Meter
CCL Meter
SIE Downhole CCL Amplifier  [2N2102 / 2N3439]
Shooting CCL

      Downhole Series Schematics
Simple Anti-Coincidence Circuit  Wellog.com's Simplest Circuit
Downhole Constant Current Circuit  SIE CBT Receiver Series Resistor Replacement
Divider / Pulse Former / Line Driver  Bell Style Single Channel - Bond Kill Ready
Divider / Pulse Former / Line Driver  Dual Channel - Bond Kill Ready
KISS Downhole Zener Low Voltage Power Supply  [Temperature Compensated]
Non-Inverting Preamp / Discriminator / Divider
SIE Style Downhole Line Switching Relay Circuit  Dual Coil Latching Relay Version
Downhole CBT Calibrator Switching Relay Circuit  Dual Coil Latching Relay Version
Bell / Pengo Style Downhole Line Switching Relay Circuit
Downhole Line Switching Relay Circuit  SPDT Non-Latching Relay Version
Downhole CBT Calibrator Switching Circuit  CRC / Western Solid State Version
Universal Pulse Former / Line Driver  Single Channel - Bond Kill Ready

      Explosives Series Schematics
Continuity Meter
Dual Fire Perforator Wiring - Steering Diode Scheme
Simple AC Shooting Box

      GO /GOI / MLS Series Schematics
TIP-120 Style Downhole CCL Amplifier  [Replacement for GO COSMOS Tools]
GO COSMOS Downhole Low Voltage Zener Power Supply  [Replacement]
GO COSMOS Scintillation Gamma Ray Preamp  Stock Version - No Thermistor
GO COSMOS Scintillation Gamma Ray Preamp  Improved Discrim. - For Hot PMTs

      Surface Equipment Series Schematics
Dummy Line / Wireline Simulator
Unity Gain Follower / Recorder Output Amplifier
SIE Stat Eliminator

     Test Equipment Series Schematics
Codatron / Corotron Test Box
Ed's CBL Simulator Box  [Dummy Line Portion]

      Voltage to Frequency Converter Series Schematics
Temp. Tool Simple VFC  Jim Norman's Min. Parts Count Circuit - Not Recommended
Temperature Tool Simple VFC  [Resistive Divider Offset Reference]
Temperature Tool Simple VFC  [Diode Voltage Reference]
Temperature Tool Simple VFC  [Resistive Divider Offset Reference]
Temperature Tool Simple VFC  [Resistive Divider Offset Reference]
Temperature Tool Simple VFC  [Resistive Divider Offset Reference - Slim Tool]
Caliper Tool Simple VFC  [Resistive Divider Offset Reference]
Caliper Tool Simple VFC  [Resistive Divider Offset Reference - Slim Tool]

      Historical Schematics
Old GO COSMOS Tool Schematic
GO Single Tube Gamma Ray / CCL Tool

Also see our Schematics menu, PCBs menu, and PCB Details and Photographs page.

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11-18-09
Last 10-18-10