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Is enough a 30VA 2x6V toroid?
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ramagochi  
#1 Posted : Saturday, January 1, 2011 2:25:03 PM(UTC)
ramagochi

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Location: Madrid
Hello,

Is enough a 30VA 2x6V toroid for powered up a Bufallo II by a Placid?, or I need to get a 7V or more transformer?.

Best Regards and happy new year.
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pinnocchio  
#2 Posted : Saturday, January 1, 2011 11:21:17 PM(UTC)
pinnocchio

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Hi ramagochi,

6-0-6 @ 30va will give you +/- 5A. On the voltage side, once passed the regulators it should give you about 8.5V DC and without load it could be even higher. Expect a voltage drop after it is fully regulated. I would probably aim at a 12-0-12 for better headroom.

Russ can confirm this

Thanks
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glt  
#3 Posted : Sunday, January 2, 2011 12:10:19 AM(UTC)
glt

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The theory goes like this:

Vdc=Vac x 1.4
The rectifiers will drop about .6v
you need about 3V headroom for Placid

So 6Vac=8.4v -.6v = 7.8v - 3V =4.8V

so not quite enough for a 5.5 Placid output.

Maybe it will work, but it is at best borderline...
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ramagochi  
#4 Posted : Sunday, January 2, 2011 2:31:42 PM(UTC)
ramagochi

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Location: Madrid
Thank you!

I'll get a 9V unit or maybe I'll connect both secondaries in series for get 12V.

Cheers!
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Beefy  
#5 Posted : Tuesday, January 4, 2011 7:20:26 AM(UTC)
Beefy

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ramagochi wrote:
I'll get a 9V unit or maybe I'll connect both secondaries in series for get 12V.


Running 12V, you will be burning off a lot of heat at the CCS. Do it properly with a 9V transformer.
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