QCHR FILES
QCHR New Addition 26-01-26 How How to Build Easy Housing
QCHR – CHOSE
Chose – Molex Plugs
QCHR – LOOS
Loos – Loos City Lists
Loos – Loos City Molex Plugs
Loos – Loos City Trolley Stop OGR December 2015
Loos – Loos City Trolly Timer
QCHR – Action Building Button Wiring
QCHR MTH
QCHR Module Standards – Updated June 2012
MTH – 5 Clip Wiring Diagram Operating Accessory
MTH – Fire House Activation Button and Return to Firehouse Automatic
MTH – Fire House Activation Button and Return to Firehouse Automatic And House on Fire smoke
MTH – Lights to add to the MTH Activated Fire Truck
RELALYS AND TIMERS
All – Timer A – 12 Volt Timer – World Chips
All – Timer B- 12 Volt Simple Relay Wiring
All – Timer C – 12 Volt Timer Diagram with 2 Position – 12 V Relay
All – Timer D – 12 volt Timer Diagram with 4 Position – 12 V Relay
All – Timer E – 12 volt Timer Diagram with 4 Position – 12 V Relay – Train Activation
All – Timer F – Multiple Voltage Operations – 12 Volt Timer and 4 Position Relay
All – Timer G – 12 Volt Wiring Flasher Timer LED Button
All – Timer H – 5 Volt Infra-Red Sensor Operational Timer Wiring for Alternating Lights
All – Timer I – 12 Volt Wiring Flasher Variable Timer Button
All – Timer J – 12 Volt Timer Diagram with Sound Card
BETHESDA NORTH HOSPITAL C – Multi Operational Timer with Six Circuits and a Button Light
CHARTS
All – Chart A -Wiring Colors for Various Voltages
All – Chart B – Resistor-Color-Code
All – Chart C – Scale vs Gauge of Trains
All – Chart D – Molex – Connector Schematics
All – Chart E – Decimal and Millimeters and Aircraft Measurements
All – Chart F – Wire Resistance Chart – OHMs Law
CIRCUITS
Circuit – QCHR Bridge Track Power Break – cuts off power to both sides of the bridge – PDF
Circuit – What is a Very Basic Description
Circuit – Install a Point to Point Auto Reversing Relay Module
WIRING
Wiring – Simple Relay Wiring – Use a button or Track Activation-PDF Rev. 3-4-2026
Wiring – All – New 2-3-4-6-9-12-Molex Plugs
Wire up a Double Pole Double Throw Switch – Operate 2 circuits – PDF
Wire a Bi-Polar Indicator light and Mini Switch – with FasTrack – DOC
Wire a Digital Volt Meter to an AC Transformer
Other Links
Basic Maintenance by Jim Barrett of OGR – PDF
City Streets Modifying Control Tricks by H. Lee Willis – PDF
City Streets Modifying O Gauge Streets – Vehicles – PDF by H. Lee Williams – OGR Forum – Website
Simple Bridge Rectifier Wiring – PDF
Build a Test Rectifier – Change AC to DC for Testing DC – PDF
Convert 3 rail AC Engine or Trolley to DC operation – PDF
Solder two ends of wire together – PDF
Solder a wire onto an existing wire – PDF
Solder a wire to Gargrave or Tubular Track – PDF
Solder a wire to Lionel Tubular type track – PDF
Bridge Track Power Break – cuts off power to both sides of a bridge – PDF
Wire up a Double Pole Double Throw Switch – Operate 2 circuits – PDF
Wire a Bi-Polar Indicator light and Mini Switch – with FasTrack – DOC
Convert 3 rail AC Engine or Trolley to DC operation – PDF
Timer/Relay – 12 Volt Timer Relay LOTS Article by Frank Kammer – Rev. 04-01-2026