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Old 19th April 2004, 09:57 PM   #1
GeDeon is offline GeDeon  Russian Federation
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Default PSU for Aleph, Aleph-X etc.

Kind time of day!
I am sorry for English - made the translator.
At me such question - why all power units, whether it be Aleph or Aleph-X, are made only with use of the big capacities for reduction of pulsations of a voltage, you see there are the circuits containing transistors which allow to reduce at smaller capacity pulsations better, than application of the big condensers is simple?
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Old 19th April 2004, 10:21 PM   #2
joensd is offline joensd  Germany
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There´s no reason to not use a capacitance multiplier to either improve PSU ripple or get by with less capacitance.
Just remember you´ll burn a few volts extra and so need bigger heatsinks (and transformer).
This kind of regulator is also described in a Passlabs article :
Have a look at the Zen Variations Part 3 here.
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Old 20th April 2004, 08:13 AM   #3
SI is offline SI  United States
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With more capacitence one doesn't have to worry about running out of Voltage or current at the rails when the load impedance lowers with the signal. I think

Reagards
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Old 20th April 2004, 05:47 PM   #4
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I think Gedeon means why not use a switching power supplies (like in a Chord)?
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Old 20th April 2004, 09:20 PM   #5
JDeV is offline JDeV  South Africa
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Why not indeed?
A and T Labs make a 700W MOSFET amp with SMPS.
See link for circuits.

http://www.a-and-t-labs.com/K6_Sw_Amp/index.htm
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Old 21st April 2004, 06:44 AM   #6
GeDeon is offline GeDeon  Russian Federation
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Greetings to all!
Thank for answers!
When I wrote the first post I had in view of something similar to a volume that has given in the reference joensd.
But I did not think about SMPS. Under your reference, JDeV, just 1kW power supply It`s good idea!
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Old 31st May 2004, 07:42 AM   #7
Golgoth is offline Golgoth  France
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Default A and T Labs 1kW SMPS

Hi all!

Has anybody actually built the A and T Labs 1kW SMPS design, either DIY or from the parts their supply?

I Googled for "A and T Labs" and all I found basically, apart from their site and a few casual mentions, was business directory listings. I couldn't find any mention on the web of somebody having built their amps or SMPS designs.

Positive or negative experiences welcome!

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