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Old 4th May 2002, 08:32 AM   #1
jleaman is offline jleaman  Belgium
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Default Switching amplifier.

Has any one ever built a switching amplifier. i have had this magazine with full details and pcb lay out of a 65watt full switching power amp stereo with power supply and all has any one ever heard of it or built one..

Might be some thing that i want to tackle..


Jason,,

if ya need the schematics and pcb layouts any one let me know also i have the full artical scanned please email me for them..
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Old 4th May 2002, 10:19 AM   #2
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Default No, but my opinion is ...

No, but my opinion is that unless your approach is purely digital, it will not be performing all that well (because you will be adding a layer of D/A + AD which is uneccessary unless your source is analog).

Over on Yahoo, there is a Digital Amp forum. It is not very active, but the history may be useful.

http://groups.yahoo.com/group/digital_amp/


Petter
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Old 4th May 2002, 11:27 AM   #3
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There are a number of digital amp topologies and the sound will differ depending on which topology you use .... having said that i haven't heard of or seen a digital amp that can match the alephs or a good tube amp....
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Old 4th May 2002, 07:33 PM   #4
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Texas Instruments has good info on switching amplifiers on their website www.ti.com
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Old 12th May 2002, 05:24 AM   #5
jleaman is offline jleaman  Belgium
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Default Power supply circuit..

Here is the power supply sircuit.. in protell 98

Jason
Attached Files
File Type: zip switching power supply amplifier.zip (4.2 KB, 220 views)
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Old 12th May 2002, 06:33 AM   #6
djk is offline djk
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Couldn't open up the file. I hope this is not the transformerless death wish from the April issue of RE/PE from about six years ago? That was a bad joke.
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Old 12th May 2002, 06:36 AM   #7
jleaman is offline jleaman  Belgium
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Default Ahhhhh

Ahh wat do you mean bad joke ?


Didnt this amp work ?

Jason
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Old 12th May 2002, 07:53 AM   #8
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April 1st is a bad joke day. That amp had so many problems it would take hours to discuss even a few of them. Consider just three: 1)line operated supply with hot chassis and no transformer for isolation. 2)the author has you cutting the bottoms out of old tin cans for soldering on to some diode leads for heatsinking. 3)no anti-aliasing filters.
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Old 12th May 2002, 12:46 PM   #9
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The file above (in zip file) is in protel schematic format.
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Old 12th May 2002, 07:01 PM   #10
jleaman is offline jleaman  Belgium
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Default HUmm

I think that your talking about a difrent amp..
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