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Offline Michael4  
#1 Posted : 01 January 2023 14:40:26(UTC)
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Michael4

United Kingdom   
Joined: 02/02/2017(UTC)
Posts: 694
Location: England, South Coast
Marklin 3352 was the last analogue brown croc made between '87 and '95

This is my newest (ie most modern) loco and I run it on my analogue layout. Everything is fine.

As can be seen from the pic it has a gizmo or lump of electronics which i assume improves reversing. Please tell me if I have this wrong and apologies for the nomenclature.

My question is whether analogue locos with 'electronic' reversing such as 3352 can be used safely with controller 6699 which uses (I think) pulse width modulation or 6600 which uses phase control modulation?

I am inclined to say yes bearing in mind that they were most likely for sale at the same time but I'm searching for reassurance!

Thanks in advance

UserPostedImageDSC03239 by dralowid, on Flickr
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Offline kiwiAlan  
#2 Posted : 01 January 2023 18:00:11(UTC)
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kiwiAlan

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Joined: 23/07/2014(UTC)
Posts: 8,489
Location: ENGLAND, Didcot
Originally Posted by: Michael4 Go to Quoted Post

As can be seen from the pic it has a gizmo or lump of electronics which i assume improves reversing. Please tell me if I have this wrong and apologies for the nomenclature.


It may be related to providing Swiss lighting for the headlights.

Originally Posted by: Michael4 Go to Quoted Post

My question is whether analogue locos with 'electronic' reversing such as 3352 can be used safely with controller 6699 which uses (I think) pulse width modulation or 6600 which uses phase control modulation?


The 6600 uses PWM control of a DC voltage, not phase control of an AC voltage. The problem with the 6600 is the reverse voltage is derived by voltage doubling the AC voltage during the rectification process, giving a reverse voltage that reaches around 40V, although it does limit the pulse length to a fraction of a second.

I don't have any experience or information on the 6699.

The 6600 will work fine with the loco pictured. AFAIK any locos that have an electronic reverse unit that uses a relay to control the field coil will also be fine, as they use standard transistors in the electronics, not an IC.
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Offline Michael4  
#3 Posted : 02 January 2023 09:42:34(UTC)
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Michael4

United Kingdom   
Joined: 02/02/2017(UTC)
Posts: 694
Location: England, South Coast
I did wonder about the Swiss lighting business but haven't followed the wiring, 3015 doesn't have such a component, I have always assumed that it makes use of the reversing unit and some clever wiring.

I can't remember where I got my info from but am happy to be corrected. I imagine 6699 is similar, at creeping speeds the locos make the same sort of odd grumbling noises and the reverse function is a very short impulse and cannot be held on.

Thanks for the info re 6600 and locos like 3352.
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Offline Michael4  
#4 Posted : 02 January 2023 15:51:10(UTC)
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Michael4

United Kingdom   
Joined: 02/02/2017(UTC)
Posts: 694
Location: England, South Coast
I wonder.

If you had two circuits, one powered by 6600 and one by a normal trafo/controller and they cross each other on a crossing there is a chance that the two would become connected very briefly as the pick up passes over. Really only relevant to 5215 which is the 'fine' crossing.

In other words connecting ac to dc. I suspect that wouldn't do 6600 any good?
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thanks 1 user liked this useful post by Michael4
Offline kiwiAlan  
#5 Posted : 02 January 2023 19:27:36(UTC)
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kiwiAlan

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Joined: 23/07/2014(UTC)
Posts: 8,489
Location: ENGLAND, Didcot
Originally Posted by: Michael4 Go to Quoted Post
I wonder.

If you had two circuits, one powered by 6600 and one by a normal trafo/controller and they cross each other on a crossing there is a chance that the two would become connected very briefly as the pick up passes over. Really only relevant to 5215 which is the 'fine' crossing.

In other words connecting ac to dc. I suspect that wouldn't do 6600 any good?


I wouldn't like to try it, the possibility of blowing up something in the 6600 is extremely high.
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Offline Michael4  
#6 Posted : 02 January 2023 23:10:45(UTC)
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Michael4

United Kingdom   
Joined: 02/02/2017(UTC)
Posts: 694
Location: England, South Coast
Originally Posted by: kiwiAlan Go to Quoted Post
Originally Posted by: Michael4 Go to Quoted Post
I wonder.

If you had two circuits, one powered by 6600 and one by a normal trafo/controller and they cross each other on a crossing there is a chance that the two would become connected very briefly as the pick up passes over. Really only relevant to 5215 which is the 'fine' crossing.

In other words connecting ac to dc. I suspect that wouldn't do 6600 any good?


I wouldn't like to try it, the possibility of blowing up something in the 6600 is extremely high.


The more I think about it the more I suspect that this is what I did to mine!

Time to change the new layout plan...
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