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Changing back to anolgue

Discussion in 'Model Railways' started by rossi, Dec 28, 2011.

  1. rossi

    rossi New Member

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    I have a Bachman J39 with fitted decoder in the tender (shop done). Is it easy to revert back from this form to analogue running? Any diagrams available ?
    Rossi
     
    rossi, Dec 28, 2011
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  2. ADB968008

    ADB968008 Guest

    You should be able to buy a blanking plate from your local model shop, remove the digital and insert the dummy.

    You should check if it's 9 or 21 pin that is fitted.

    Heres a link to two on eBay..

    21 PIN DCC BLANKING PLATE 36-058 X10 NEW BACHMANN NEW | eBay

    DCC DECODER 21 PIN BLANKING PLATE x 4 | eBay

    If you wanted to make it permanent... Remove the wiring altogether, if it's a split chassis model. Make sure the can motor contacts touches both sides of the plates, or ensure wiring runs to the contacts on the motor from the pick ups by the wheels directly.
     
    ADB968008, Dec 28, 2011
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  3. Martin Perry

    Martin Perry Nat Pres stalwart Staff Member Moderator Friend

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    It should run on analogue even with the decoder fitted.
     
    Martin Perry, Dec 28, 2011
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  4. Dan Hamblin

    Dan Hamblin Part of the furniture

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    If I remember correctly the J39 is not DCC ready, therefore the shop will have had to isolate both halves of the split chassis block in order to covert to DCC operation. Your best bet is to change the CV setting which specifies DCC only, that way you should be able to run it using an analogue controller, juest be aware that you will have a bit of lag on starting off.

    Regards,

    Dan
     
    Dan Hamblin, Dec 28, 2011
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  5. rossi

    rossi New Member

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    Thanks for the info. Have just tried the loco on DC but nothing. Not took it apart yet, but I have a feeling it will be one of the split chassis locos.
    It used to run under code number 4 when I was using DCC. I will set a piece of track up with connections to the Lenz Compact and see what info I can get. Not sure if its possible to give it the address of zero...then in theory it should run on analogue...or maybe not!!!
    Rossi
     
    rossi, Dec 30, 2011
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  6. Martin Perry

    Martin Perry Nat Pres stalwart Staff Member Moderator Friend

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    Martin Perry, Dec 30, 2011
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  7. ADB968008

    ADB968008 Guest

    If its a conversion done in the tender, then just remove the DCC and reconnect the wires bypassing the Dcc chip ?
     
    ADB968008, Dec 30, 2011
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  8. rossi

    rossi New Member

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    Thanks once again for all the info regards the J 39.
    Started to dismantle the chassis from the body, fiddling with the minute screws...Then thought about the last piece of advice on this page.
    I disconnected the decoder (set in the tender) from the wires protruding from the inside of the cab. Reconected the originals...but nothing. I then did a different connection, and hey presto, away she went in full glorious analogue mode.
    Cheers everyone,
    Rossi
     
    rossi, Jan 3, 2012
    #8

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