Author Topic: Power Supply repair need help  (Read 377 times)

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Offline Andbro

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Power Supply repair need help
« on: July 23, 2019, 11:17:08 am »

I have an old power supply built with Lm723 and 2N3055. The transformer is dead.
What's the best solution for fix

1- Replace the transformer by a new?

2- Replace the transformer by quality SMPS like Mean Well or CUI?



Offline firewalker

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Re: Power Supply repair need help
« Reply #1 on: July 23, 2019, 12:20:32 pm »
Will the noise of the SMPS be an issue? What is the price difference?

Become a realist, stay a dreamer.


Offline PKTKS

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Re: Power Supply repair need help
« Reply #2 on: July 23, 2019, 12:58:41 pm »

Well  i am aware that LM723 can implement even switch mode..

But 99.99%  LM723 topology is LINEAR.

Using a 2N3055 BINGO! you have a LINEAR SeriesPass
usually  ranging from 2 to 20V - in rare cases 0-22

You can make a new winding on your old TRAFO ..
But depending on the price of any equivalent...
I would not.

Here i can find a brand new one almost the cost of rewinding


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