V100(#544340 from train set #55721) with #56560 sound effect circuit.

• This page shows installing #56560 sound effect circuit for V100(from train set #55721 VTG train set).
• More detailed information(electric circuit chart etc.) coming in future.

Tasks of the project:

• Install the sound effect circuit for larger(than V36) space loco with more good sound quality.
• Install must be done without change of exterior, include cab interior(=what you see must not change).
• No function must be deleted(running character, telex, headlight control etc.).
• Stability for daily operation and play with RC(radio controled) vehicles.

Arrangement of equipments:

Points:

• The #56560 circuit board installed upper of c95 decoder.
• Place of c95 does not change.
• Cooling fan installed underside of smoke stack.
• Speaker set in place of steam generator on real loco.

Details:

<#56560 sound effect circuit>

Points:

• #56560 sound effect circuit put on a 'Z' profile metal fitting fixed on the floor.
• Setting for pots on c95 can be made by 'swing' #56560 with metal fitting.
• Motor outputs picked up from PCB pattern on the way to motor.
• Motor and speaker wiring has nylon connector for easy maintenance.

<Speaker / Acoustics>

Points:

• A Speaker changed for 8 ohm 5cm small speaker.
• Black painted 2x 1.2mm(=2.4mm) thickness styrene plastic plate as a baffle board.
• Engine room acts as an enclosure. Engine room and cab are dumped by butyric rubber pad.
• A speaker tilted not only for space problem but also for reduce reflection from floor, roof and side wall of engine room.
• Opening for sound on the roof of steam generator hood, shaved from back side of steam boiler chamber. It took about five hours to shave 1mm thickness(by Dremell mototool)!!

<Cooling fan>

Points:

• For cooling the circuit, small fan for PC's(18V-DC) installed under side of smoke stuck.
• The air draw in from bottom edge of the engine room and get off from smoke stack.
• Insulation partition of air made by styrene plastics.
• Aluminium inner sheet is stuck for:
  • Insulating from radio wave by RC equipments(when play with RC friends!)
  • Heat radiation.
  • Dump the resonance of engine / horn sound.
• The effect of cooling fan can be seen in here.

Conclusion:

• All the tasks I enforced for myself has achieved.
• Very good sound quality and large volume has achieved.
• Steam boiler's grill got great reality by making opening.
• This is my second sound locomotive. Interference of two loco's sound is very attractive. Especially when the locos are double headed.

Copyright © 2000 by Jun Maeda / KOBE JAPAN