modification for Bachmann sound

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7 years 1 month ago #46 by Johns33dodge
I found a modification for big hauler sound on line to add a resistor and capacitor to the sound board for better chuff. Has anyone done this? this instructions says it was in Garden Railroad magazine at on time. Anyone know what issue that was?

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7 years 1 month ago #47 by Tom
Replied by Tom on topic modification for Bachmann sound
Do you have a link that gives details on the modification? Resistors are going to restrict current flow and a capacitor is probably going to be used as a decoupling capacitor, which could make the sound more consistent.

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7 years 4 weeks ago #51 by DBCherry
This web page should give you everything needed to fix the Bachmann sound boards. Find the one you have in your tender.

www.girr.org/girr/tips/tips4/bachmann_sound_tips.html

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7 years 4 weeks ago #52 by Johns33dodge
I have this saved but the picture is small and the needed capacitor information is not clear, it says 30 mf and when I search for it I get all kinds of sizes and shapes

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7 years 4 weeks ago #53 by DBCherry
Do you mean 30mf or 330mF?
Which option are you looking at?

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7 years 4 weeks ago #54 by Johns33dodge
sound generator modification- ask for 30-50 mf

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7 years 4 weeks ago #55 by DBCherry
Either a 33 or 47mf are standard values. as for voltage the minimum for this circuit should be 15 volts or higher. The higher the voltage rating the larger the capacitor. Stay below 25 volts if you can.
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