An old trafo 6117

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Rocca		#1 Posted : 24 December 2014 09:47:18(UTC) Retweet
Joined: 28/01/2004(UTC) Posts: 617		Dear friends, Unfortunately it happened that this old Trafo fallen down on the floor. Despite this, it seems continue working properly and the red light on the top too, but it seems it is making some more noise just when it is plugged. I can't remember if it was doing the same noise before the falling, but I wish I could know if, in your experience, it may be any trouble. Have you any advice? By the way, I wish you all a Merry Christmas and Happy New Year!! Stefano Rocca


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SteamNut		#2 Posted : 24 December 2014 10:30:24(UTC) Retweet
Joined: 11/05/2013(UTC) Posts: 488		This was discussed just recently that old transformers should be replaced period. Hate to see something happen to you or to your set, think of it as cheap insurance.

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Renato		#3 Posted : 24 December 2014 10:45:56(UTC) Retweet
Joined: 19/03/2004(UTC) Posts: 976 Location: Gorizia, Italy		Hi Stefano, The noise of a transformer is normal, as the 50 Hz frequency of main supply vibrate the magnetic little plates of which the magnetic core is formed. In very cheap transformer the noise could be almost loud, if the plates are not very well pressed and fixed. Maybe after the fall, in your transformer the plates moved a little and now the transformer is a bit louder than before. The noise is only a disturbing thing: most important is to check there are not damages such as wires not insulated in contact with the metal case of the transformer. Also important is to check that there are not moving parts which could cause short circuits inside. My suggestion is that the metallic case of the transformer is connected to earth and have it checked by a professional electrician. Cheers Renato

1 user liked this useful post by Renato		Rocca
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RayF		#4 Posted : 24 December 2014 12:47:29(UTC) Retweet
Joined: 14/03/2005(UTC) Posts: 15,839 Location: Gibraltar, Europe		Happy Christmas to you, Stefano! As stated above, at least get it checked professionally. These older transformers were not built for safety and there could be significant risk of electric shock or damage to your trains. New 6647 transformers from starter sets are availble very cheaply on ebay and have the added bonus of not frying your digital decoders.
		Ray Mostly Marklin.Selection of different eras and European railways Small C track layout, control by MS2, 100+ trains but run 4-5 at a time.

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kiwiAlan		#5 Posted : 24 December 2014 15:01:38(UTC) Retweet
Joined: 23/07/2014(UTC) Posts: 8,107 Location: ENGLAND, Didcot		Originally Posted by: RayF Happy Christmas to you, Stefano! As stated above, at least get it checked professionally. These older transformers were not built for safety ... I don't believe that. Certainly the later 280A transformers (the ones with only 3 sockets) carried the 'double insulated' symbol. I think the older ones with the six sockets also did. The 10VA transformers also had the 'double insulated' symbol IIRC. I'll have to check the 10VA one I have to be certain. The big problem with them was the power cord used, which does perish and needs replacing with a modern cord.

2 users liked this useful post by kiwiAlan		Rocca, hennabm
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Rocca		#6 Posted : 26 December 2014 21:22:14(UTC) Retweet
Joined: 28/01/2004(UTC) Posts: 617		Hi Renato, Thank you so much for your advices. No there aren't any wires not insulated in contact with the metal case of the transformer. Anyway, I'll get it checked. I know about the replacement Märklin campaign for the new ones 6647, but I need this old ones in my layout in which I run only old loco, as old cranes and everything else vintage....lol!! I adore it Beest regards Stefano Originally Posted by: Renato Hi Stefano, The noise of a transformer is normal, as the 50 Hz frequency of main supply vibrate the magnetic little plates of which the magnetic core is formed. In very cheap transformer the noise could be almost loud, if the plates are not very well pressed and fixed. Maybe after the fall, in your transformer the plates moved a little and now the transformer is a bit louder than before. The noise is only a disturbing thing: most important is to check there are not damages such as wires not insulated in contact with the metal case of the transformer. Also important is to check that there are not moving parts which could cause short circuits inside. My suggestion is that the metallic case of the transformer is connected to earth and have it checked by a professional electrician. Cheers Renato


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Rocca		#7 Posted : 26 December 2014 21:24:13(UTC) Retweet
Joined: 28/01/2004(UTC) Posts: 617		thanks...Merry Christmas back to you too!! Originally Posted by: RayF Happy Christmas to you, Stefano! As stated above, at least get it checked professionally. These older transformers were not built for safety and there could be significant risk of electric shock or damage to your trains. New 6647 transformers from starter sets are availble very cheaply on ebay and have the added bonus of not frying your digital decoders.


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