Joined: 07/01/2015(UTC) Posts: 729 Location: England, Suffolk
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Hi again, this has been an interesting find. There is no trace of it on ebay as well, not that I'm bothered about it. I managed to get this back into working conditions, removed the rust on the various internal moving 'pivots' and have decided not to put any grease nor oil on them.
This object can't be connected to a 7072, there are no cables for it. Looking at the 1950 catalogue it seems that it needs an additional loose track section that wasn't in the box. I connected the Yellow cable to the transformer L socket, the black cable to the O transformer socket. I managed to get it to switch from green to red and vv by touching the yellow cable on the M track integral to the semaphore. Surely there must be a better way of doing this. A contact track ?
Do any of you, 'oldies' but with my highest respect, know how this actually worked ?
Thank you
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 1 user liked this useful post by ocram63_uk
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Joined: 04/02/2011(UTC) Posts: 3,563 Location: Paris, France
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Hi Ocram My early Märklin signals look like this  There are 2 generations: * before 1952: one solenoid and a ratchet mechanism. It operates with 20 VAC (Green socket of the 280A 1950 version with 6 secondary sockets) * 1952 and after: two solenoids operating with 16 VAC. It operates from the yellow socket. The new reference is 445A Note: on both version of signals that era, the center rail was cut (isolated) and a half length rail with the centre rail cut was included  The later version of the 445 from 1952 catalogue  Both version can be controlled from any Märklin 474/4, 474/8 or more recent 7072 Note any regular 1/2 straight will do with a paper insulation in replacement of the special 1/2 track piece included with the 443G semaphores Cheers Jean |
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 1 user liked this useful post by JohnjeanB
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Joined: 07/01/2015(UTC) Posts: 729 Location: England, Suffolk
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mine is definetely pre-1952 The track is 'segmented' and underneath it two blue cables are soldered to each segment. In turn they are soldered to a distribution plate connected to the solenoid 
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Joined: 01/03/2008(UTC) Posts: 2,883 Location: South Western France
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Originally Posted by: ocram63_uk  mine is definetely pre-1952 The track is 'segmented' and underneath it two blue cables are soldered to each segment. In turn they are soldered to a distribution plate connected to the solenoid ....]
Like Jean said, this is exactly the way it should look Here are the connections required: You should have a yellow wire to power the bulb on top of the mast (12-16 V) The black wire is connected to the electro-magnet. Requires 24 volt pulse (the green output on older transformers) One pulse, it turns the signal to "green", next pulse it turns it to "red" For both, the "power return" is through the track , so make sure the track is connected to the "O" connection of the transformer The switching of (traction) power to the center rail is internal, no need to connect anything , but you need to create an insulated section ahead of the semaphore (either using a piece of cardboard between the tongues of two tracks, or better with an isolated 1/2 length section 3600 UNN, that was normally delivered with the signal The connections on the side are for the catenary, should you also power your trains from the overhead. Hope this answers it. Have fun Jacques |
Jacques Vuye aka Dr.Eisenbahn Once a vandal, learned to be better and had great success! |
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