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Electrics DCC getting you started - Electrics - DCC - Getting You Started. - Your Model Railway Club
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 Posted: Mon Oct 9th, 2017 05:38 am
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Hi All.  According to the instructions from Hornby , when one converts the A1x to DCC, the orange capacitor has to remain in the circuit. As I understand it, the capacitor is surplus to requirements, as the Decoder takes over that job. Best wishes.  Kevin



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 Posted: Mon Oct 9th, 2017 05:48 am
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MaxSouthOz
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Absolutely almost correct, Kevin.

The capacitors are dinosaurs from the days when DC model trains created interference on your valve radios and TV's.  They serve no useful purpose today.  In fact they are reputed to cause problems for decoders.

I always snip off the capacitors, strip the loco down to motor and pick up wires and begin hard wiring from there.

Cheers



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 Posted: Mon Oct 9th, 2017 06:07 am
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Hi Max.  Thank you for your reply. It is surprising that an established company like Hornby are so far behind the times.The pick up wires that you mentioned have an odd arrangement in Hornby Locos to say the least.
Best wishes. Kevin



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 Posted: Mon Oct 9th, 2017 09:56 pm
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I agree with Max ... wot 'e sed!!  :cool:

The Hornby instruction is probably on legal grounds - they have to maintain any radio suppression for the locomotive to comply electrically and electronically with the regulations. However, the decoder, which has to be hard-wired into a Terrier, does all of this anyway.

Hornby tend to have the capacitor wired directly to the brushes, and the track wires feeding into the legs of the capacitor much closer to the 'head'. Since you have to wire the orange and grey wires to the brushes in any case, it doesn't matter if you snip or unsolder the capacitor legs from the brushes; it has to be done anyway.



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 Posted: Tue Oct 10th, 2017 06:15 am
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Hi Jeff  Thank you for your reply.. when you say “ Directly to the brushes” I have noticed that the motor sits on two contacts from the running rails ( I believe these have to be insulated with Kapton Tape)Best wishes. Kevin



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