Manual Volume Control - M.T.H. New York MTA R-21 Operating Instructions Manual

Manual Volume Control

– To adjust the volume of all sounds made by
this engine, turn the master volume control knob located under the engine
clockwise to increase the volume and counter-clockwise to decrease the
volume (see Fig. 1).
Loco-Sound
Volume Adjustment Knob
Figure 1. Location of the Loco-Sound Volume Adjustment Knob
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RailKing R-21 4 Car Subway Set