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Fitting DCC decoders to N gauge locos


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I currently have OO gauge running on DCC and have decided to also have N gauge.  To save on buying extra controllers, I would prefer to run the N gauge on DCC but am unsure as to the DCC readiness of N gauge locos and what decoders I would need.  So far I have bought a Grafar Bachmann Merchant Navy in orginal form, a Dapol M7 and a Graham Farish King.  I suspect the MN will be DCC ready wih a 6 pin socket in the tender but doubt that either the M7 or King will have any DCC provision.  I read some years ago that Graham Farish locos required some kind of plastic top hat thing that replaced a part of the mechanism to enable conversion to DCC. 

 

I would be grateful for any advice.

 

Regards,

 

Steve

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Old design Farish loco designs, with a 3 or 5 pole motor integral with the loco chassis block, presented some issues for conversion.  Those need an insulated brush sleeve for the lower brush gear, one such device is the "DigiHat".   Other than that, its just a matter of hard wiring decoders to the locos.   There are no really difficult issues. 

 

- Nigel

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