Bachmann and DCC Query

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Dave Potter - 22 Jun 2004 19:01 GMT

Having seen on certain web pages that when installing a DCC decoder into a
Bachmann 37 the removal of the little orange capacitors aids running etc., I
was wondering if any of the other Bachmann locos also have these capacitors
and do they need removing too?

(I ask to save me removing bodies un-necessarily)

TIA
Dave

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Andrew - 23 Jun 2004 08:44 GMT

> Having seen on certain web pages that when installing a DCC decoder into a
> Bachmann 37 the removal of the little orange capacitors aids running etc., I
[quoted text clipped - 5 lines]
> TIA
> Dave

All locos have capacitors across the motor for suppression of
interference. They (and any other suppression components) should be
removed when converting to DCC as they can appear as a low impedance
to the decoder output. This leads to erratic running as some of the
intended motor current is shunted through the capacitor and, worse,
possible damage to the decoder through overloading it. The exact
outcome depends upon the combination of the motor, the suppression
components, and the decoder.

Andrew

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Stu - 24 Jun 2004 19:51 GMT

> > Having seen on certain web pages that when installing a DCC decoder into a
> > Bachmann 37 the removal of the little orange capacitors aids running etc., I
[quoted text clipped - 16 lines]
>
> Andrew

If you look at http://www.electricnose.co.uk/dcc/dccbachmann.html , then you
can find fitting instructions for certain Bachmann locos - mentioning where
the capacitors are.

Stu

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Model Forum / General / Railroads / June 2004

Bachmann and DCC Query