Smallphry - diary of a model railway

Farish HST DCC Conversion

Bachmann/Graham Farish have recently re-released the HST with a completely new chassis. This chassis is of a similar design to that of the class 66 and revised class 57, but they have taken a slightly backward step as far as DCC conversion goes by not including the marked solder tags (and they still haven’t managed to make a DCC plug-and-play chassis, but that’s another article). However, this new chassis is much easier to convert than the older ones.

The body is easy to remove - insert a thin screwdriver or finger nails either side and the chassis just drops out. You will now see the circuit board atop the chassis. We will do the conversion by removing the two coils (labelled L1 and L2) and soldering the decoder in their place. There is space to put the decoder in the guards compartment (on the right in the photos).

Start by removing the two coils with a small pair of clippers.  Remove the yellow, blue and white lighting wires from the decoder and cut the other wires to length, the red and black being the shorter pair (see the photos). Now solder the red, black, orange and grey wires as shown in the photos.

All that’s left is to place the chassis on the programming track to test and programme as usual.

Hello will this wokr for the Class 91 GNER models do you know?

Hi,
I don’t know the class 91. I suspect it is using the older style chassis, in which case this articel will be more appropriate: http://smallphry.com/eecore/index.php/site/farish_diesel_dcc_fitting/

thanks Il’l buy it as its currentlyony 22GBP on ebay and then take a look under the body to see which chassis it is basedon .