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DC. Electrics to DCC or vice versa? - Electrics - DC - Getting You Started. - Your Model Railway Club
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 Posted: Sun Aug 6th, 2017 09:23 am
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Passed Driver
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Hi All.  It is like this I had this idea of buying Hornby Pugs and either running them on a separate line from a goods shed at the back of a DCC layout (no physical connection between the two systems). Or I could convert all the Pugs to DCC? The cost of converting all seven Hornby and two ex Dapol seemed too much to me.From what I can remember about DC wiring, there was just one " Hook Up Point" and the main was live when the train was running , but the sidings were dead until the points were thrown. Meaning that you could stable a Loco on the siding throw the points and forget about it. Where DCC is completely different . The third idea is to Flick a Switch
and change the power supply, would this work?   All the best. Kevin



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 Posted: Sun Aug 6th, 2017 10:11 am
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Yes, the switch must disconnect one power supply & the output of that control system
to be replaced with the other power supply & control system.
The minimum would be a 4PDT switch    but if you just wanted to switch the control outputs, then a 2PDT would do


https://www.youtube.com/watch?v=bjowI73aky4
https://www.youtube.com/watch?v=7i_4sUezIGk



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Ron
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 Posted: Sun Aug 6th, 2017 10:42 am
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Hi Ron. Thank you for your reply. So does that bean that where all parts of the DCC layout are live all the times, that I couldn't isolate an Analogue loco on a DCC layout by changing the points as I could on ac DC layout???All the best. Kevin



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 Posted: Sun Aug 6th, 2017 11:37 am
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Hi Ron.   I have another unrelated question on "multi pin" (555) Sub D plugs and sockets, which had me quessing ?it would seem that  pin 1 fits into 5 and pin 11 fits into 15 and so on? I wanted to build a "Mimic Panel" for manual points , not a problem?? But then I kept getting malfunctions , until I discovered that ( by laborious testing ) the pins on the male plug were the opposite way round to the apertures on the socket. But I couldn't find a straightforward answer when I googled it. Can you please advise me??
All the best. Kevin



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 Posted: Sun Aug 6th, 2017 12:52 pm
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Passed Driver wrote: Hi Ron. Thank you for your reply. So does that mean that where all parts of the DCC layout are live all the times, that I couldn't isolate an Analogue loco on a DCC layout by changing the points as I could on a DC layout???All the best. Kevin

Do not leave an analogue loco on a DCC layout even by isolating the track via a switch or the turnout in case the switch or turnout is accidentally turned on .  Keep analogue locos away from DCC layouts...



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Ron
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 Posted: Sun Aug 6th, 2017 12:54 pm
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Sol
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Passed Driver wrote: Hi Ron.   I have another unrelated question on "multi pin" (555) Sub D plugs and sockets, which had me quessing ?it would seem that  pin 1 fits into 5 and pin 11 fits into 15 and so on? I wanted to build a "Mimic Panel" for manual points , not a problem?? But then I kept getting malfunctions , until I discovered that ( by laborious testing ) the pins on the male plug were the opposite way round to the apertures on the socket. But I couldn't find a straightforward answer when I googled it. Can you please advise me??
All the best. Kevin


Kevin, I cannot answer that as I do not have any "multi pin" (555) Sub D plugs and sockets.



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 Posted: Sun Aug 6th, 2017 12:59 pm
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Hi Kevin,

DC/DCC switching? I've seen a DC locomotive quietly humming and melting the armature on a mixed layout because of a "forgotten" switch. This was a clinic on the dangers of mixing the 2 systems. Most folks I know keep the 2 separate (HO plus HOn9 for example). I've also seen it done with a preservation line off the main layout.

Go DC on a DCC layout? Go 100% is the safest. IMO more trouble than it's worth though. Safer to put decoders in everything.

Nigel



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 Posted: Sun Aug 6th, 2017 01:02 pm
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Hi Ron.  Thank you for your reply. It would seem that my other idea would be best. I K Brunel and his transshipment station, from Broadgauge to Standard or in my case from DCC side of the platform to the separate DC line.All the best. Kevin



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 Posted: Sun Aug 6th, 2017 01:04 pm
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Hi Ron.  Thank you anyhow, it was worth a try. Kevin



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 Posted: Sun Aug 6th, 2017 01:11 pm
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Hi Nigel.   Thank you for your reply. That is probably for the best. But as well as the Pugs I have my A1x Terrier to be done, not forgetting the 1980's Schools Class..  All the best. Kevin



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 Posted: Sun Aug 6th, 2017 08:39 pm
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Hi Kevin,

You've got the "shiny" bug. I made a rule a long time ago not to buy a new locomotive (not necessarily new manufacture) until the last one had a decoder installed and was running. That way you don't end up looking at half a dozen DCC conversions and thinking about the cost of the decoders and maybe DC operation....a slippery slope.

Nigel



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 Posted: Sun Aug 6th, 2017 09:24 pm
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Hi Nigel.    Thank you. This iPad drives me nuts? I was just about to send you a reply, when thr screen went into " Two halves mode".it is a PITA, and I don't know why it happens? Back to the Locos? It all snowballed . And that is why the alternative plan came to me. So l will limit myself at first, Terrier, ex Dapol Pug , Blue Diesel, see how they go? If all is well I will probably do the othe ex Dapol Pug? And put the rest aside? All the best. Kevin



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 Posted: Tue Aug 8th, 2017 05:55 am
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Hi Nigel.  All the Locos that are awaiting a DCC Decoder (apart from the Hornby Terrier) are very 2nd hand.All the best  Kevin



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