Vonzack Posted December 12, 2011 Share Posted December 12, 2011 Hi, I'm looking to convert a Farish Class 43 HST to DCC, it's a split frame version with a PCB see pic. I have two questions; 1) Components C1 / C2, these are fed from the Motor + / -, but are linked, I take it these are acting like the old Poole chasis supressor and should be removed for DCC? 2) Components L1 / L2, what are these coils doing, they must lower / limit the voltage going to the motor, my feeling is to remove them will that be OK? Cheers, Mark. Link to post Share on other sites More sharing options...
Nigelcliffe Posted December 12, 2011 Share Posted December 12, 2011 C1/C2 look to be motor suppression. L1/L2 look like inductors, also part of motor noise suppression. The inductors will have less effect on a chip's sensing ability, but may as well go at the same time as the capacitors. Link to post Share on other sites More sharing options...
RMweb Premium Steven B Posted December 12, 2011 RMweb Premium Share Posted December 12, 2011 C1 and C2 are motor supression capacitors and can be removed or left depending on your mood. Some decoders don't care about them, others are a bit more fussy. I've not noticed a difference either way. If you remove the inductors (coils), L1 and L2 then you've got a very easy way of fitting the decoder. Solder the red and black wires in the left hand holes vacated by the inductor (i.e. track left and right), and then solder the motor orange and grey wires to the right hand holes of the inductors. Alternatively, remove the inductors (could even snip them off) and solder red and black to the pads marked R+ and L- (using R for red, L for black), and then solder the grey and orange wires to the pads marked MO+ and MO-. Simples as the meercat would say. Happy modelling. Steven B. Link to post Share on other sites More sharing options...
JackSt Posted December 12, 2011 Share Posted December 12, 2011 The Farish HST was my first attempt at DCC conversion. I was surprised just how easy it was http://smallphry.com/eecore/index.php/site/comments/farish_hst_dcc_conversion/ The above link as pictures to show you how. Have fun Jack Link to post Share on other sites More sharing options...
Vonzack Posted December 13, 2011 Author Share Posted December 13, 2011 Hi Guys, Thanks for the input, I think I'll remove the caps C1/C2 as well as L1/L2, then wire the decoder to the PCB. Just waiting for the chip to arrive. Cheers, Mark. Link to post Share on other sites More sharing options...
mjkerr Posted December 13, 2011 Share Posted December 13, 2011 I have two such chassis I simply soldered the decoder to the tabs as per the instructions, not had any issues Equally, this PDB is so much easier than the Class 57 / 66 Link to post Share on other sites More sharing options...
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