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The σ78 and σ79 ultra low noise voltage regulators

Upgrades for the 78xx and 79xx 3-pin TO-220 fixed voltage regulators

Re: The σ78 and σ79 ultra low noise voltage regulators

Postby amb » October 19th, 2018, 11:40 am

Should be ok.
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Re: The σ78 and σ79 ultra low noise voltage regulators

Postby poseidonsvoice » October 19th, 2018, 11:48 am

Ti,

Thanks.

I forgot to include that the transformer is a Zettler Magnetics BV series rated at 2VA with dual secondaries (12V x 2), and 83mA per secondary.

Best,
Anand.
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Re: The σ78 and σ79 ultra low noise voltage regulators

Postby muskyhuntr » December 22nd, 2018, 5:00 am

Hi

Can I use10uF X7R's in place of X5R's in the C1 position. Out put voltage is 20V input voltage is 24V.
I have X5R's in 25V, but don't think they would work due to voltages.

Thanks,
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Re: The σ78 and σ79 ultra low noise voltage regulators

Postby amb » December 22nd, 2018, 5:12 am

If your X7R caps are in the correct size package then yes, you can use them in lieu of X5R.
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Re: The σ78 and σ79 ultra low noise voltage regulators

Postby muskyhuntr » December 22nd, 2018, 5:28 am

Great! Thank you.

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