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Dalle AC Sound System Overview
The DCv3 Locomotive Sound System has been replaced by an improved version known as the HiLine™ Sound Systems.

AC Sound System Overview

The AC SOUND SYSTEM consists of two boards. The first board is the power supply board and Whistle/Horn/Bell decoder for standard AC operators. The second board is the main sound system. This system can be connected to virtually any locomotive operating with standard AC track power. To operate the Whistle/Horn and Bell requires conventional control buttons. These can be found as external control units or integral to the transformer. Dallee also offers two different conventional controllers. Information on them can be found on our web site AC SOUND CONTROLLER.

The main sound board measures less than 1" wide X 2¾" long X ½" high. The power supply board is quite small, it measures less than ¾" wide X 1.¾" long X 1" high. The volume control is located on the main sound board as well as a rate control. There are two connecting wire harnesses between the power supply board and the main sound board which are 6" in length. They both are equipped with double sided tape to secure them to the chassis. You do however have to select an appropriate speaker, listed on page 6. These speakers were specifically selected for their sound output versus the audio input power as well as their sound quality and durability. They are quite efficient! For most "O" gauge installations, the recommended speaker would be item #214, "S" gauge installations would use item #212 or #213. Both gauges could also utilize some of the oval speakers as well. The oval speakers are highly recommended for diesel locomotive's with an EMD type prime mover since these produce low frequencies.

The steam sound systems feature an "auto-chuff" function. This will produce 16 levels of exhaust chuff versus the applied motor voltage. This way the exhaust chuff will speed up and slow down in a smooth fashion instead of jumping to different exhaust rates as you run your locomotive. You can also elect to make the steam sound system synchronized via our optical pickup (item 583) or a switch input.

There are two controls on the sound board. The first is to set the volume, the second is to either set the auto-chuff chuff speed or the diesel rpm versus the motor voltage. This allows you to set the desired speed at which the sounds operate in regards to the applied motor voltage. This way you can fine tune how your sound system will respond to the applied motor voltage.

If you choose to utilize the LocoMatic™ Controller, then you can also operate extra features of the sound system. You will however require an additional choke (item 701 or 702). The extra features for a Steam sound system include "main sounds off" and "cylinder blow down". The "main sounds off" feature allows the operator to turn off all of the sounds produced by the sound system except for the Whistle and Bell. The "cylinder blow down" function allows for the operator to open the ball-cock's up on the steam locomotive before pulling the engine out. This allows for steam to clear up any condensed water in the cylinders before pulling the train out. The extra features for a Diesel Locomotive are "main sounds off" and "force Notch 8". Again, the "main sounds off" feature allows the operator to turn off all of the sounds produced by the sound system except for the Horn and Bell. The "force Notch 8" feature allows the operator to override any existing notch (RPM) that the prime mover is operating at. This allows the prime mover to operate full bore so that enough propulsion energy can be made to pull the heavy load up a grade as well as pump up the air tanks before pulling the train out. Don't forget, Diesel locomotives operate via electric motors. The Diesel motor turns a generator which makes the electricity to power the electric traction motors. So it is necessary for the prime mover to generate a lot of electric power when pulling a heavy load up a grade. With this function, you can simulate this type of operation yielding a more prototypical operation of your train.





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