Dave_67 Posted October 9, 2014 Share Posted October 9, 2014 When I started in DCC the Hornby locos that I bought were all classed as DCC ready. Following the wisdom of the time I removed any capacitors. Now that DCC fitted locos are available I was interested to learn whetherthese engines are marketed with / without capacitors in place.Thanks to customer care for enabling me to access the Hornby site once again. Dave Link to comment Share on other sites More sharing options...
Fishmanoz Posted October 9, 2014 Share Posted October 9, 2014 Don't know the answer to your specific question but DCC locos do not need external suppressor capacitors as the suppression is built into the decoder. When converting, all suppression components should be removed. They degrade the DCC signal. Link to comment Share on other sites More sharing options...
idlemarvel Posted October 9, 2014 Share Posted October 9, 2014 There's a long debate on this on "in another place" here:http://www.rmweb.co.uk/community/index.php?/topic/90986-capacitor-on-dcc-fitted-locos/The gist of it is as fishy says, probably best to remove them, but read the above if you want the gory details. Link to comment Share on other sites More sharing options...
Fishmanoz Posted October 9, 2014 Share Posted October 9, 2014 Yes, best not to go into what are certainly gory details on the use of low pass filters to suppress electrical interference and their effect on DCC signal square waves at frequencies well above 10kHz. Oops, I already did! Link to comment Share on other sites More sharing options...
Dave_67 Posted October 9, 2014 Author Share Posted October 9, 2014 Thanks for those replies , I had seen the long discussion elsewhere. When I removed a capacitor from my L1I snipped the wrong wire & had to carry out some tricky fixing . The DCC fitted option would interst me,Dave Link to comment Share on other sites More sharing options...
96RAF Posted October 9, 2014 Share Posted October 9, 2014 Interesting that on some of their 0-4-0 conversions Hornby ditch some of the capacitors but retain others.Why springs to mind - unfortunately no explanation is given in the blurb.Any of you smarty pants out there know why? Link to comment Share on other sites More sharing options...
Fishmanoz Posted October 9, 2014 Share Posted October 9, 2014 I'm not certain but I think it may be a belt and braces approach to UK regulatory requirements on interference suppression. I still don't think it is necessary though. Link to comment Share on other sites More sharing options...
poliss Posted October 9, 2014 Share Posted October 9, 2014 It used to be necessary on old decoders, but not sure about modern ones, especially those made in Europe. Link to comment Share on other sites More sharing options...
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