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Old 8th January 2007, 09:36 PM   #1
Lovan is offline Lovan  Sweden
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Default Capacitance multiplicator in Alephs?

Hello

How come that noone is using a capacitance multiplicator in their powersupplies for the alephs? Not as a substitut for a big bank of capacitors but as a komplement.
The bride of zen uses one, ZenV3 has one, why not Alephs?

Cheers!

/Niclas
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Old 8th January 2007, 10:12 PM   #2
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Works fine - just put some (preferably big) caps to ground after it.

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Old 8th January 2007, 10:19 PM   #3
Lovan is offline Lovan  Sweden
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Thank you Nelson I will try that
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Old 9th January 2007, 12:34 PM   #4
Vix is offline Vix  Yugoslavia
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Quote:
Originally posted by Nelson Pass
Works fine - just put some (preferably big) caps to ground after it.

Nelson, do you mean Big caps after the capacitance multiplier?Aren't they supposed to be before the cap multiplier? As I understood, usually there were some small capacitors (220uF elko bypassed by a 1uF film) after the capacitance multiplier (zen v3 and v4 for example). Why big caps now? Are they necessary in case of higher bias currents?

Regards,

Vix
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Old 9th January 2007, 03:25 PM   #5
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Capacitance multipliers are good at smoothing the DC, but not so good at responding to varying demands from the circuit. The capacitors after the capacitance multiplier are there to handle transients.

Grey
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Old 9th January 2007, 07:55 PM   #6
Lovan is offline Lovan  Sweden
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How about a multiplicator and then a CRC? too much?
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Old 9th January 2007, 08:12 PM   #7
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by Lovan
How about a multiplicator and then a CRC? too much?

if you use multiplicator,you use it already instead of R.....
so you don't need it again
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Old 9th January 2007, 08:27 PM   #8
Manu is offline Manu  Europe
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Which config would be the best for, lets say Aleph 5?
How much device to parallel to handle the required current? (refering to ZV3schematic)
Manuel
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Old 9th January 2007, 09:07 PM   #9
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Actually you can get by with 1 device per rail, since the draw
of an Aleph 5 is about 2A per channel and using a Mosfet
for capacitance multiplier gives it a dissipation of about 4V X 2A
or 8 watts.
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Old 9th January 2007, 10:09 PM   #10
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We are DIY...there is no such thing as too much.
Or, to put it another way:
If some is good, then more is better, and too much is just enough!
I'm in the beginning stages of planning (yet another) tweeter amp. I'm flipping coins at this point, but the most likely configuration at this time is RCLC, followed by an optional capacitance multiplier or regulator, followed by--you guessed it--more C.

Grey
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