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Offline Robyn Boyd  
#1 Posted : 07 February 2015 18:25:56(UTC)
Robyn Boyd

United States   
Joined: 25/11/2010(UTC)
Posts: 23
Location: everett, WA
General question on the 6647 transformer (32 VA, 220 volts)
I was given a 220 volt transformer, and I wanted to know if I could step it down to 110 volts to use for lighting purposes. I run all analog locomotives on "M" track. Would I have to separate the lighting circuits (if that is even possible)? Could I also use it to run the locomotives or accessories at the stepped down voltage?

Thank you for your responses in advance!
Offline kiwiAlan  
#2 Posted : 07 February 2015 18:48:30(UTC)
kiwiAlan

United Kingdom   
Joined: 23/07/2014(UTC)
Posts: 8,082
Location: ENGLAND, Didcot
Originally Posted by: Robyn Boyd Go to Quoted Post
General question on the 6647 transformer (32 VA, 220 volts)
I was given a 220 volt transformer, and I wanted to know if I could step it down to 110 volts to use for lighting purposes. I run all analog locomotives on "M" track. Would I have to separate the lighting circuits (if that is even possible)? Could I also use it to run the locomotives or accessories at the stepped down voltage?

Thank you for your responses in advance!


You could supply it with 110V and you will get around half the voltage output. However you will not get the full wattage i.e. your 32VA will be down to around 8VA before the output voltage sags under load (you might still get satisfactory operation at 10-12VA). This is an inherent function of the limitations of the transformer.

So you won't be able to run many normal bulbs off it, the standard old Marklin bulbs were listed at 1VA each. However the bigger limitation is the maximum voltage you will get, so old type bulbs will glow very yellow/orange. Running LED lighting designed for 9-12V will be more successful, as it will also draw less current, and make the capability of the transformer go a bit further.

Offline Webmaster  
#3 Posted : 07 February 2015 21:24:35(UTC)
Webmaster


Joined: 25/07/2001(UTC)
Posts: 11,161
How about using a pre-stage 110V-220V step up transformer to feed the 6647?

Just a thought...
Juhan - "Webmaster", at your service...
He who asks a question is a fool for five minutes. He who does not ask a question remains a fool forever. [Old Chinese Proverb]
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