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Old 9th July 2011, 07:28 PM   #1
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Default Capacitance multiplier from Zen variation 3

Hi,

is the schematics for the negative rail allright? Isn´t the IRFP9240 mosfet drawn wrong? Shouldn´t it be that Drain is input and Source is output?

Thanks.
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Old 9th July 2011, 07:34 PM   #2
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You are so right.

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Old 10th July 2011, 11:17 AM   #3
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Default IRFP250

I have some IRFP250 which I could use instead of IRFP240. But is it wise to use 250 together with 9240 in bipolar regulated supply as 250 will have lower output impedance than 9240? Is this "imbalance" problem?

Thanks.
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Old 10th July 2011, 12:06 PM   #4
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Old 12th July 2011, 11:43 AM   #5
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Isn't Q2 turned upside down? Source must go to -25V...
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Old 12th July 2011, 12:57 PM   #6
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Quote:
Originally Posted by Skorpio View Post
Isn't Q2 turned upside down? Source must go to -25V...
Yes, just read the first post. Dont only look at pictures .
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Old 6th June 2012, 08:10 PM   #7
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Default Cross-talk?

Hi,

I am using mosfet capacitance mulitplier in PSU for a tube preamp. I have 220uF-mosfet-470uF-both channels. Is there a problem sharing one cap multiplier for both channels together? Have I increased cross talk this way?

Thanks.
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Old 6th June 2012, 08:40 PM   #8
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depends of wiring layout and sort of load/final stage
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Old 6th June 2012, 08:56 PM   #9
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Each wire connecting each channel is taken from one point, like "Y" shape, where the shared point is output from cap multiplier. Load is cca 25mA.
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Old 6th June 2012, 09:25 PM   #10
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good enough
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