OS3 All Pro Controller
(Immediate payment required
US and Canadian Addresses only.)

To pay with money order or check
or for foreign orders
Click here for the manual order form


  The HO ALL Pro is an HO Scale electronic controller featuring all the basics of the Pro Series controllers. It is intended for use with All HO cars. It features:

- 3 Range Adjustable Sensitivity.   A 3 position switch offers three different ranges to maximize the Sensitivity adjustment. The Middle switch position is intended for most HO cars.   It provides a range that is good for some Tjets through most SS magnet cars.   The Low (s) setting can be used to lower the Sensitivity range down for Tjets, DASH, Johnny Lightning, Auto World and some AFX/MT cars.   When running hot magnet cars and 12V gravity cars the High (S) setting can be used.

- Adjustable Brakes.   A 100 ohm brake pot provides the best braking range for HO racing.

- Adjustable Coast. Coast is now set slower than the previous version.   This new range provides better slow speed control where only a small amount of power is applied to the car.   This amount of power start way below what is required to start a car moving or even keep it moving but it works well in providing just enough extra roll to counteracts strong magnetic downforce on magnet cars.   Since the Coast design is not resistor-based it does not use the Coast pot to dissipate heat.   All heat is contained inside the controller where it is safe to handle.   All 3 Pots on the ALL Pro will remain cool at all times (Assuming proper track connection).   Note: The previous version was designed with Auto-Pilot racers in mind.   This is where the Coast power is used to navigate the turns and the racer pulls the trigger on the straights.   This is harder on the controller and usually not the preferred way to race.   Since very few race this way anymore we decided to change the range.   If the old range is desired we can easily construct one with the old range.


This unique design allows the Coast and Sensitivity to be independent of each other.  Set the Coast and then set the Sensitivity WITHOUT having to go back and readjust the Coast.

The RED Brake wire does not have to be connected for Coast to function.

- Adjustable Choke to flatten out the response of the controller.  This allows the entire range of the trigger to be used in controlling the car vice just a small portion.  The Choke is fully bypassed at the full trigger pull.  The RED Brake wire does not have to be connected for Choke to function.


HO ALL Pro Controls

Sensitivity Selector Switch - With the switch in the (s) position the Sensitivity knobs adjusts the lowest Sensitivity Range.   With the switch in the (S) position the highest Sensitivity Range is selected.   With the switch in the middle the middle and most useful range is selected.

Brake/-/Coast Selector Switch - With the Switch in the "B" position Brakes are selected.  In the "C" position Coast is selected.  With the Switch in the middle position neither Brakes nor Coast is selected.

Sensitivity Knob - Fully CCW is the lowest sensitivity for the slowest starting speed within the selected Sensitivity Range.  Fully CW is the highest sensitivity for the highest starting speed within the selected Sensitivity Range.

Choke Knob - Fully CCW provides the most choke, the flattest response.   Fully CW provides the lowest choke or normal linear response.

Brake/Coast Knob - With the B/-/C switch in the B position, Fully CCW yields Maximum brakes, 0 ohms, while fully CW yields Minimum brakes, 100 ohms.  Minimum Brakes still provides some braking.  To remove all braking from the controller the RED Brake wire needs to be removed.   With the switch in the C position, Fully CCW yields the Minimum Coast.   Fully CW yields the Maximum Coast.   With the switch in the middle position the knob has no effect.