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Offline Moritz-BR365  
#1 Posted : 13 October 2015 13:49:23(UTC)
Moritz-BR365

Germany   
Joined: 02/04/2013(UTC)
Posts: 682
Hello,
I got a Märklin 85 007 (Artikel-Nr. 3309) in good condition for 65€ only. Therefore, I decided to convert it to digital. I will use either a Digital-Sounddecoder from Märklin (mSD or mSD/3) or from Doehler&Haass (SD21A-4). The 3-pole motor shall be replaced by the common 5-pole High propulsion drive.

This is the loco, I'm talking about:

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This is the original electronic direction toggle switch:

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This is how it looks like after dismantling:

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First, I started to convert the motor to the HLA:

5-Pole Märklin 60941:

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Ball bearing in the gearbox for the armature shaft:

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Next, drilling the motor shield and place the ball bearing:

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The drilling hole is not 100% centered, but not a problem, You can adjust when mounting the motor shield.

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Short video from first test run with 5-pole and one ball bearing:



A self made bracket will hold the mtc21 decoder board and the speaker:

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Test with Decoder:

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and here with the speaker glued onto the bracket:

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to be continued ...
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Offline Ken Mitchell  
#2 Posted : 13 October 2015 16:10:51(UTC)
Ken Mitchell

Australia   
Joined: 06/07/2014(UTC)
Posts: 67
Location: Berry, NSW
Hello Moritz,

the conversion is looking good. You seem to have plenty of room for the changes. Look forward to the completed job. I have recently bought a new MS2 controller for a small digital layout and like yourself have a number of analogue locomotives that are suitable for conversion. I watch with interest to your outcome.

Kind regards

Ken in Australia
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Offline Moritz-BR365  
#3 Posted : 24 October 2015 15:46:58(UTC)
Moritz-BR365

Germany   
Joined: 02/04/2013(UTC)
Posts: 682
The work goes on, first step for the LED head light circuit board

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Offline Moritz-BR365  
#4 Posted : 24 October 2015 21:01:52(UTC)
Moritz-BR365

Germany   
Joined: 02/04/2013(UTC)
Posts: 682
Finally LED circuit board assembled:

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Offline Moritz-BR365  
#5 Posted : 25 October 2015 01:13:35(UTC)
Moritz-BR365

Germany   
Joined: 02/04/2013(UTC)
Posts: 682
... and power on!

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Offline river6109  
#6 Posted : 25 October 2015 03:49:57(UTC)
river6109

Australia   
Joined: 22/01/2009(UTC)
Posts: 13,926
Location: On 1965 Märklin Boulevard just around from Roco Square
Moritz, you've done a great job there but be careful and try the next time to get the ball bearing right in the centre, I use drills slightlyu bigger than the hole and than work my way up to 3.9mm and the rest of 1mm I'll make sure the ball bearing doesn't fall through. although I use a Dremel drill I drill the hole by hand making sure I'm staying at the centre all the time. the older 3 pole armature and its motor shield had quite a bit of play but the 5 pole with its perm. magnet and the motor shield, if it isn't dead centre you will find it doesn't turn at all or its max. speed is restricted.

mine is still on the workbench and it will have a few more gadgets attached to it and I may look inot a Zimo sound decoder with 6 Aux functions, ESU Sound decoders only get you 4 Aux functions with the 51968 Adapter plate or you have to buy a more expensive adapter plate to obtain 6 Aux functions and the questions is would it fit into the available space.

My project will be:

ball bearings (done this)
Aux 1 = smoke unit
Aux 2 = telex coupling front
Aux 3 = telex coupling rear
Aux 4 = gearlight
Aux 5 = cabin light
Aux 6 = fire box

I also be looking at what maximum size speaker I can fit into it and of course led's front and rear, the question is however did they have marker lights ? could you verify this

regards.,

John
https://www.youtube.com/river6109
https://www.youtube.com/6109river
5 years in Destruction mode
50 years in Repairing mode
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Offline Moritz-BR365  
#7 Posted : 25 October 2015 10:02:54(UTC)
Moritz-BR365

Germany   
Joined: 02/04/2013(UTC)
Posts: 682
Hello John,
thanks for Your comments!

Originally Posted by: river6109 Go to Quoted Post
mine is still on the workbench and it will have a few more gadgets attached to it and I may look inot a Zimo sound decoder with 6 Aux functions, ESU Sound decoders only get you 4 Aux functions with the 51968 Adapter plate or you have to buy a more expensive adapter plate to obtain 6 Aux functions and the questions is would it fit into the available space.

My project will be:

ball bearings (done this)
Aux 1 = smoke unit
Aux 2 = telex coupling front
Aux 3 = telex coupling rear
Aux 4 = gearlight
Aux 5 = cabin light
Aux 6 = fire box

I also be looking at what maximum size speaker I can fit into it and of course led's front and rear, the question is however did they have marker lights ? could you verify this


I think about using a Doehler&Haass SD21A-4 Sound decoder, because I have to use more then 4 AUX ports, too:

FL = front head light
RL = rear head light
Aux 1 = front marker light
Aux 2 = rear marker light
Aux 3 = telex coupling front
Aux 4 = telex coupling rear
Aux 5 = smoke unit
Aux 6 = cabin light

The only thing is, that AUX5/6 are not available on the mtc21 board but only on solder pads on the decoder.

Alternatively I could switch both Telex to one AUX:

FL = front head light
RL = rear head light
Aux 1 = front marker light
Aux 2 = rear marker light
Aux 3 = telex coupling front / rear
Aux 4 = smoke unit
Aux 5 = N/A
Aux 6 = N/A

Then, I could stay with the mSD sound decoder.

I haven't checked yet, if there was a 85 007 with marker lights. But, if You run them as museum loco, they must have marker lights. Otherwise, they will not get a license to run on german rails!

Regards,
Moritz

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Offline Moritz-BR365  
#8 Posted : 31 October 2015 13:49:44(UTC)
Moritz-BR365

Germany   
Joined: 02/04/2013(UTC)
Posts: 682
Video from converted 85 007 with Doehler&Haass Sounddecoder SD21A-4, dancing the coupler walz:
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Offline river6109  
#9 Posted : 31 October 2015 14:10:28(UTC)
river6109

Australia   
Joined: 22/01/2009(UTC)
Posts: 13,926
Location: On 1965 Märklin Boulevard just around from Roco Square
Moritz, looks good, you may bend the telex bar 1/2mm upwards to make sure it is just above the coupling bar.

John
https://www.youtube.com/river6109
https://www.youtube.com/6109river
5 years in Destruction mode
50 years in Repairing mode
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Offline mbarreto  
#10 Posted : 31 October 2015 20:41:45(UTC)
mbarreto

Portugal   
Joined: 18/02/2008(UTC)
Posts: 1,007

The sound is very good and seems better than the ESU...

Miguel
Mostly Märklin H0.


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Offline Moritz-BR365  
#11 Posted : 31 October 2015 21:58:23(UTC)
Moritz-BR365

Germany   
Joined: 02/04/2013(UTC)
Posts: 682
Hello Miguel,
I'm not sure if it is better than the Esu, but the decoder is much cheaper. This sound is from Matthias Henning, who is well known for his high quality sound projects!

Some more pictures after the conversion:

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Here maybe is enough space for the bigger 1.000µF capacitor:

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Offline Moritz-BR365  
#12 Posted : 09 November 2015 10:28:56(UTC)
Moritz-BR365

Germany   
Joined: 02/04/2013(UTC)
Posts: 682
Here some (nearly) final pictures. I found space for a second capacitor, in total I have now 940µF capacity, enough for main usage.

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Finally, I have to change the Telex circuit. I tested to connect to the case (rail), but the Telex won't work good. Therefore, I have to change and connect again with Decoder-Plus.

And here is a video from motor test stand:



The HLA motor runs well and acceptable noisy. The minimal speed is 1,8km/h, which is the minimum I was able to set with the Doehler&Haass decoder on FS1!

And, finally, I haven't yet realized the head/rear light LED board for the front lights!
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Offline river6109  
#13 Posted : 09 November 2015 15:59:39(UTC)
river6109

Australia   
Joined: 22/01/2009(UTC)
Posts: 13,926
Location: On 1965 Märklin Boulevard just around from Roco Square
this capacitor in the back will this not prevent the full swing action ?
https://www.youtube.com/river6109
https://www.youtube.com/6109river
5 years in Destruction mode
50 years in Repairing mode
thanks 1 user liked this useful post by river6109
Offline Moritz-BR365  
#14 Posted : 09 November 2015 17:07:59(UTC)
Moritz-BR365

Germany   
Joined: 02/04/2013(UTC)
Posts: 682
Originally Posted by: river6109 Go to Quoted Post
this capacitor in the back will this not prevent the full swing action ?


No, the capacitor is not bigger than the mount for the bulb. There is still some space between the capacitor and the case.

Look here, I removed the bulb socket:

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