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Colworth direct drive DC controller - Electrics - DC - Getting You Started. - Your Model Railway Club
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 Posted: Thu May 31st, 2018 11:49 pm
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amdaley
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Hello Everyone.
 
While rooting around in some boxes I discovered a Colworth direct drive DC controller ?
Its a panel mounted unit that i used many years ago.
However I have no idea what the input voltage should be & can't seem to find any information anywhere on the net.
Can anyone shed some light or have any information relating to the unit ?
 
Thanks.
Tony.



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Tony.
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 Posted: Fri Jun 1st, 2018 12:24 am
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MaxSouthOz
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Any chance of a photo or two, Tony?



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 Posted: Fri Jun 1st, 2018 12:43 pm
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amdaley
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Hi Max.

Here are a few photos.
There is some writing on the back but its long since faded.
It looks like use "something" supply DC ?
When I get a chance I'll try a DC adaptor & see what happens ?



Tony









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 Posted: Fri Jun 1st, 2018 08:09 pm
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MaxSouthOz
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Hi Tony.

Yes.  There is no transformer, so I think that you are right.  No AC house power.

The 2 N 3055 transistor (with its heat sink), is the give away.

If you have a variable output 12 Volt DC power supply available, connect a mulitimeter set to DC Volts to the output, and start with both control knobs set to off and slowly wind them up. 

If you're going to put it into service, a laptop charger as a power supply, is ideal.

They are available on ebay pretty cheap.  For example . . .

https://www.ebay.com.au/i/272310752253?chn=ps

Cheers



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 Posted: Sat Jun 2nd, 2018 12:17 am
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amdaley
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Thanks Max.
I'll see what I can do with it later.
Tony.



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Tony.
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 Posted: Sat Jun 2nd, 2018 03:52 pm
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amdaley
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Dug out a 12 volt Dc adaptor & connected up via the yellow wires.Success it works fine so I guess the controller just takes an uncontrolled 12 volt DC output.
I'll use it on my study test tracks so I won't need to go downstairs every time I want to test a loco.
Here's a photo of my study test tracks.
Dc in front & DCC at the rear.


Tony.






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Tony.
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 Posted: Sat Jun 2nd, 2018 08:19 pm
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MaxSouthOz
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Looks good, Tony.  :thumbs

If you're going to use it on your layout, check that the adaptor can supply at least 1 Amp.

Five would be better.

Cheers



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 Posted: Sat Jun 2nd, 2018 08:47 pm
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amdaley
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MaxSouthOz wrote: Looks good, Tony.  :thumbs

If you're going to use it on your layout, check that the adaptor can supply at least 1 Amp.

Five would be better.

Cheers

Its 1 amp Max.
Its only for testing locos on my test track.
Tony.



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 Posted: Sat Jun 2nd, 2018 08:49 pm
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MaxSouthOz
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Excellent!  :cool:



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