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4QD HRB-412 Horn Relay Board
Price: $44.99
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Availability: Available
Item #: HRB-412 -

These HRB relay boards are designed to control 3 or 4 relays from one of the 4QD hand throttles. Often used for lights and horns on model locomotives they can be used in many other applications. The circuit allows control of either 3 or 4 relays with only 2 or 3 wires. It also has a number of ''break points'' on the circuit board that gives it a lot of flexibility to be used with [e.g. sound] systems that require isolated switch inputs.Miniature locomotives often need to operate twin horns and...

4QD HRB-424 Horn Relay Board
Price: $44.99
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Availability: Available
Item #: HRB-424 -

These HRB relay boards are designed to control 3 or 4 relays from one of the 4QD hand throttles. Often used for lights and horns on model locomotives they can be used in many other applications. The circuit allows control of either 3 or 4 relays with only 2 or 3 wires. It also has a number of ''break points'' on the circuit board that gives it a lot of flexibility to be used with [e.g. sound] systems that require isolated switch inputs.Miniature locomotives often need to operate twin horns and...