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3046/3047 BR 44 Digital Conversion- Keeping the smoke unit?
Joined: 05/12/2004(UTC) Posts: 2,991 Location: CA, USA
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Hi all!
I'm in the midst of converting my 3046 SNCF BR 44 (same as the German 3047 of course)the smoke . Any on how/where I solder an AUX wire from the decoder to keep the smoke unit as an on/off function? And if I need to insulate or modify anything to do so?
It might be a simple answer, but I thought I'd ask here before trying to reinvent the wheel.
Thanks! |
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Joined: 01/05/2016(UTC) Posts: 623 Location: Athens
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In these locos the contact for the smoke generator and the front light are common.
What I did is to leave the contact as it is and solder the f1 br/red (AUX 1) for the smoke unit on it. The return will be the loco body and frame.
Don't use the contact for the light and replace it with a LED connected to f0 gray and orange (through an appropriate resistor) totally insulated from the frame and the old light contacts
Regard
Costas
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Joined: 09/08/2008(UTC) Posts: 1,933 Location: Auckland,
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There is a contact plate from the later loco's that can be used if ordered as a spare part. I've done that on some conversions a few years back.
Cheers....
Mike
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Joined: 10/02/2006(UTC) Posts: 3,997
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Joined: 05/12/2004(UTC) Posts: 2,991 Location: CA, USA
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Thanks everyone! The weekend has me running around but hopefully one evening this week I can take a closer look and find a solution based on your suggestions. More to follow! |
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Joined: 05/12/2004(UTC) Posts: 2,991 Location: CA, USA
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Hi all, I finally got to work on this project. My proposed solution is as follows, I'd welcome opinions before I accidentally fry a decoder!
- I have isolated the headlamp by adding plastic spacers between it and the copper smoke unit contact below. This seems like a simple wiring job of connecting the headlamp to the white (NEM DCC/ESU) forward headlight wire. It retains the screw grounding to the chassis.
- Now for the smoke unit. I know I need to attach a current wire to the copper base plate (+) for the smoke unit. In theory it should just retain its common ground (-) contact to the body housing. Assuming that is correct thus far, the question becomes this: which wire on the ESU decoder do I connect? The Green "AUX1" wire? I'd assume so, but images show it requiring a blue wire as return. Is that no longer necessary?
Thanks in advance! |
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Joined: 22/01/2009(UTC) Posts: 14,875 Location: On 1965 Märklin Boulevard just around from Roco Square
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your absolutely right, the green wire is 99.9% used for the smoke generator and the blue wire is usually DC for flicker free led's, so long you've separated the smoke unit connector from from the the front light you should be safe and also make sure the front lights are isolated from the smoke unit connector and if you use led's make sure your white wire has a resistor the other wire is blue, if you connect one wire to the chassis the light will flicker.
regards.,
John |
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Joined: 05/12/2004(UTC) Posts: 2,991 Location: CA, USA
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Originally Posted by: river6109  your absolutely right, the green wire is 99.9% used for the smoke generator and the blue wire is usually DC for flicker free led's, so long you've separated the smoke unit connector from from the the front light you should be safe and also make sure the front lights are isolated from the smoke unit connector and if you use led's make sure your white wire has a resistor the other wire is blue, if you connect one wire to the chassis the light will flicker.
regards.,
John Thanks John! Worked like a charm. Now the smoke unit itself is clearly heating and the contact isolated with voltage, but not smoking the way it should so on to step two... |
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3046/3047 BR 44 Digital Conversion- Keeping the smoke unit?
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