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jleaman 4th May 2002 08:32 AM

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..


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..

Petter 4th May 2002 10:19 AM

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.


AudioFreak 4th May 2002 11:27 AM

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....

jackinnj 4th May 2002 07:33 PM

Texas Instruments has good info on switching amplifiers on their website

jleaman 12th May 2002 05:24 AM

Power supply circuit..
2 Attachment(s)
Here is the power supply sircuit.. in protell 98


djk 12th May 2002 06:33 AM

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.

jleaman 12th May 2002 06:36 AM

Ahh wat do you mean bad joke ?

Didnt this amp work ?


djk 12th May 2002 07:53 AM

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.

AudioFreak 12th May 2002 12:46 PM

The file above (in zip file) is in protel schematic format.

jleaman 12th May 2002 07:01 PM

I think that your talking about a difrent amp..

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