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Voltage of a transformer for HO

Mario
 

Good afternoon.
I'm going to move some HO locomotives I have but I don't have a transformer for it. I have got this transformer and I don't know if it will work for HO locomotives.
I put a picture of the voltage that has the transformer and amps.
The command station I have is the Yamorc YD7001.
Thank you very much for your help.
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The SMPS will work with H0 locos, however the voltage is on the high side and I would not advise that the output is used directly.

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From: [email protected] <[email protected]> On Behalf Of Mario via groups.io
Sent: 15 October 2024 17:29
To: [email protected]
Subject: Voltage of a transformer for HO

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Good afternoon.
I'm going to move some HO locomotives I have but I don't have a transformer for it. I have got this transformer and I don't know if it will work for HO locomotives.
I put a picture of the voltage that has the transformer and amps.

The command station I have is the Yamorc YD7001.
Thank you very much for your help.

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Mario
 

Good morning.
I apologize for my English, I am using a translator from Spanish to English.
I have put it on the YD7001 and the output voltage I get is 18.4v on the track.
So, is it too high?
Thank you very much for your help.
 

Mario

The problem is that 18.4v you read could be higher or lower as normal multimeters cannot read a DCC signal accurately because it is not a 50/60Hz sine wave.

I personally consider this to be too high and would look for somewhere around 16v output?


Many Thanks

Iain Morrison


On Wed, 16 Oct 2024 at 09:37, Mario via <mario.chica.perez=[email protected]> wrote:
Good morning.
I apologize for my English, I am using a translator from Spanish to English.
I have put it on the YD7001 and the output voltage I get is 18.4v on the track.
So, is it too high?
Thank you very much for your help.
Mario
 

Ok, I will look for something as you indicate. I have one from the Roco Multimaus that I'm not using and I'll put it on the YD7001.
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Thank you very much for your help.
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Best regards,
Mario
 

You cannot use an AC transformer !!!
 

Karst

Whilst the OP called it a ‘transformer’ he showed a picture of a SMPS with a 19v DC output ?


Many Thanks

Iain Morrison


On Wed, 16 Oct 2024 at 14:05, karst.drenth via <karst.drenth=[email protected]> wrote:
You cannot use an AC transformer !!!
 

I found this on EBay and have bought several of these.
They are well built and has the correct size connector.
Would like to see more safety agency approvals.
Comes with the power cord also.
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--
Dennis Cherry
Owner/Moderator
Mario
 

Good morning.
The one I am using is the one in the photo.
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But I'm thinking of using the one in the first photo which is 19 volts and using some antiparallel capacitors to lower the voltage.
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But I'm thinking of using the one in the first picture which are 19 volts and using some diodes in antiparallel to lower the voltage. Each pair of diodes drops 0.7v and what I would do would be to put 4 diodes in antiparallel which would drop 1.4v. That would be within the voltage range.
Do you see it right?
Thank you very much for your help and I apologize for my english, I am using a translator.
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Mario
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Mario
 
Edited

I think I have succeeded. I have used the diodes in antiparallel and lowered the output voltage.
Best regards,
Mario
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Mario
 

I have added the picture of the SMPS I am using.
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If you live in Europe the output should isolated from the input ground, not all SMPSs are. If it had the double insulated symbol (square in square) then it definitely would be.
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Mike
Mario
 

So it's no good?
Do I have to look for one that has that double insulation?
Thank you very much.
Mario
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Do a continuity test between the supply ground and both outputs, if there is none it should be ok.
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Mike
Mario
 

Ok, I'll give it a try.
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Thank you so much.
Mario

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