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DIY Stompboxes => Building your own stompbox => Topic started by: crawler486 on April 19, 2004, 04:03:38 AM

Title: Power Supply question...
Post by: crawler486 on April 19, 2004, 04:03:38 AM
Hello guys.

I bought a 24 volt transformer for
my "Ultra Clean 9v Power Supply"  project.
On the other side of the transformer opposite
the terminals you connect to the mains,
there are 3 terminals labeled 24v,0,24.

I tapped only the left 24v and zero and seems to work fine.
But do I have to connect to both 24v terminals?

Does that makes sense? Not very fluent in english.
Title: Re: Power Supply question...
Post by: spongebob on April 19, 2004, 04:38:32 AM
Quote from: crawler486
I tapped only the left 24v and zero and seems to work fine.

That's ok, you could use the other terminal to create a negative DC voltage, for a bipolar power supply for example.

Can't you get a transformer with a lower secondary voltage? 24V is a lot more than you need for a stable 9V supply (it will be around 30V DC after rectification), so the voltage regulator will produce a lot of heat, make sure you use a heatsink!
Title: Power Supply question...
Post by: crawler486 on April 19, 2004, 05:44:12 AM
24 volts is the one listed in the bill of materials.

I'm planning to use it to supply about five guitar effects
all (including the power supply) in one enclosure.
Title: Power Supply question...
Post by: Gnome on April 19, 2004, 10:50:48 AM
I think if you use the two 24-plugs, and wire the 0-one to the ground, it will be more silent. If I'm right, it is a center tappet tranny, so it will make the ultra low noise supply even more ultra silent, if I'm right.