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poliss

Hornby now say leave em in

Suppression capacitors that is.
I was following up a question on the Big H about runnaway trains on DCC, found this webpage http://www.wiringfordcc.com/runaway.htm so went to the Hornby FAQ's to see there was anything about dissabling DC on CV29. I noticed there were two different FAQ's. One I'd read before, H don't know if suppression caps should be removed blah blah blah. But there was also a new FAQ that says leave them in place. https://www.hornby.com/customer-support/faq/hornby-dcc,40,HAR.html
I put a message for the forum admin about the FAQ's and within a few mins the old one was removed.
Teleman

I think it should be left across the motor but thats it . On some DCC moudles they have that cap fitted to the board so it can be removed . Its a case of see the instalation sheet that comes with the decoder and follow that as far as i can make out .
If the cap is across the pick ups it might upset the DCC signal , i can't tell because i can't find a site that gives the info needed to work it out .All they say is its AC , now thats brown and smelly because they then show a signal on a carrier so it more like a FM radio signal
poliss

Some sites say leave em in, others say rip em out. I say try with them in first then if there are problems, take them out.
Teleman

If there across the motor there should not be any problems
Rog (RJ)

Teleman wrote:
If there across the motor there should not be any problems
Even if the capacitors are only across the motors they can still cause problems.  They can interfere with the feedback circuit on decoders with back emf.
I always try the loco with the caps left in and only if I get any problems do I take them out.

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