Adding Sound & Smoke to Märklin 3796

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Adding Sound & Smoke to Märklin 3796 - BR 96

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skeeterbuck		#1 Posted : 26 October 2018 00:20:52(UTC) Retweet
Joined: 15/12/2015(UTC) Posts: 523 Location: Maryland, Baltimore		I'm thinking of adding sound and smoke to my Märklin 3796 BR96 Mallet Loco. I've included some pics and as you can see I've already ungraded the motor bearings. There's a rather large hole under where the Suethe #10 would go and if my measurements are correct I would only have to go about 1.2mm before breaking through from the smokestack to the hole underneath. The smokestack now is about 3.5mm inside and will need to be widened to 5mm to accommodate a #10 unit. This all looks rather straight forward to me but I'm looking for input to possible problems before starting in just in case I overlooked anything. Thanks! Chuck [img][/img] [img][/img] [img][/img] [img][/img] [img][/img]

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JohnjeanB		#2 Posted : 31 October 2018 21:15:44(UTC) Retweet
Joined: 04/02/2011(UTC) Posts: 3,130 Location: Paris, France		Hi Chuck I installed a Märklin Sound decoder on a BR 96 but unlike you I did not installed a smoke unit but rather a Telex coupling. The delicate point for me was to keep the rear truck (with the motor) free to rotate laterally (of course) but also vertically so that the traction tyre is always in contact with the track. This seems a piece of cake but the limited available space and the loud speacker type and positioning are to be adressed. IMO decoders with a separate PCB must not be used. All is OK now. This is a good project I think Cheers Jean
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ktsolias		#3 Posted : 31 October 2018 21:53:13(UTC) Retweet
Joined: 01/05/2016(UTC) Posts: 610 Location: Athens		Just now I am on the same project. Mine is a 37967 with mfx sound decoder. I have already did the mapping for the AUX 1 (f1), is easy with the CS3 and working fine The problem is that the upper hole is 3,5mm. Inside is a metal diaphragm in which easily I did a 3,5mm hole The hole in the lower side is a 5mm. Can not be opened to 7mm to fit a no 20 generator because is very important for the movement of the front track. So the other way is to widen the hole into the smoke stack to 5mm for the no 10 generator but the outside diameter is 7mm. Is 1mm round enough or we will be with the smoke stack separated from the body??? Regards Costas Edited by user 01 November 2018 17:36:44(UTC) \| Reason: Not specified


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river6109		#4 Posted : 01 November 2018 02:55:15(UTC) Retweet
Joined: 22/01/2009(UTC) Posts: 14,728 Location: On 1965 Märklin Boulevard just around from Roco Square		Hi, I have been disappointed with this loco when I found out it didn't have a smoke generator, Märklin sometimes had introduced locos without a smoke generator but included one at a later releases., I think the 3311 is one example with the latest version having one. it would be nice if Märklin would produce this model with all wheels powered as they did with the class 44 and 50's. etc etc but no they produce the same model as a limited edition or have some other reasons to reproduce it without any improvements. there also seems to be trend manufacturers these days design locos for the collector who has no desire ever to build a layout and therefore never would use a smoke generator or use the loco other than looking at it. Suppose the silenced the critics the model is not to scale or not authentic., I'm surprised they haven't got rid of the rubber tyres all together. John
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skeeterbuck		#5 Posted : 01 November 2018 11:46:44(UTC) Retweet
Joined: 15/12/2015(UTC) Posts: 523 Location: Maryland, Baltimore		Originally Posted by: ktsolias The problem is that the upper hole is 3,5mm. Inside is a metal diaphragm in which easily I did a 3,5mm hole The hole in the lower side is a 5mm. Can not be opened to 7mm to fit a no 21 generator because is very important for the movement of the front track. So the other way is to widen the hole into the smoke stack to 5mm for the no 10 generator but the outside diameter is 7mm. Is 1mm round enough or we will be with the smoke stack separated from the body??? Regards Costas Exactly, but I think that the stack can be drilled to the 5mm. From my experience the metal casting can be drilled rather easily. You just need to use sharp drill bits and go slowly not taking too much metal at once. My current plan is to start with the 3.5mm bit which fits inside the stack casting now, then gradually go larger working my way up to a 5mm bit in the hope it will help keep the bit centered in the stack. I have mm & inch size bits which give me some "in between" sizes. My concern is fitting the decoder and most of all finding room for a speaker.


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ktsolias		#6 Posted : 01 November 2018 17:35:56(UTC) Retweet
Joined: 01/05/2016(UTC) Posts: 610 Location: Athens		Originally Posted by: skeeterbuck Originally Posted by: ktsolias The problem is that the upper hole is 3,5mm. Inside is a metal diaphragm in which easily I did a 3,5mm hole The hole in the lower side is a 5mm. Can not be opened to 7mm to fit a no 21 generator because is very important for the movement of the front track. So the other way is to widen the hole into the smoke stack to 5mm for the no 10 generator but the outside diameter is 7mm. Is 1mm round enough or we will be with the smoke stack separated from the body??? Regards Costas Exactly, but I think that the stack can be drilled to the 5mm. From my experience the metal casting can be drilled rather easily. You just need to use sharp drill bits and go slowly not taking too much metal at once. My current plan is to start with the 3.5mm bit which fits inside the stack casting now, then gradually go larger working my way up to a 5mm bit in the hope it will help keep the bit centered in the stack. I have mm & inch size bits which give me some "in between" sizes. My concern is fitting the decoder and most of all finding room for a speaker. I had already drill the 3,5mm hole and have started the 4mm. As you mention the metal in mine drilled easilly. For the decoder and the speaker: The pictures of the 37967 may help Of course is a different design but the space is the same You can see the power pack which is not necessary The speaker has his own place in the decoder holder I think that there is enough space for the small speaker of the mSD/3 Märklin decoders. In case that is not you can use a small ESU speaker http://www.esu.eu/en/pro...ccessories/loudspeakers/ Regads Costas

6 users liked this useful post by ktsolias		GlennM, 1borna, skeeterbuck, PJMärklin, ixldoc, dickinsonj
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jonas_sthlm		#7 Posted : 01 November 2018 18:33:25(UTC) Retweet
Joined: 12/10/2008(UTC) Posts: 891 Location: Stockholm, Södermalm		alternative with mSD3
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5 users liked this useful post by jonas_sthlm		ktsolias, 1borna, skeeterbuck, ixldoc, dickinsonj
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skeeterbuck		#8 Posted : 03 November 2018 17:38:54(UTC) Retweet
Joined: 15/12/2015(UTC) Posts: 523 Location: Maryland, Baltimore		A small update. I was able to successfully drill out the smokestack on my BR96 to be able to fit a Seuthe Smoke Unit. I started with a 3.5 mm bit and gradually worked my way up to the 5mm that I needed. After some minor paint touch up to the inside of the stack it's ready for the unit to be inserted. [img][/img]

5 users liked this useful post by skeeterbuck		xxup, Crazy Harry, PJMärklin, H0, ktsolias
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