Hi everyone,
I was just wondering if it would be possible to design a class AB audio amplifier which is powered directly from 220V AC via a diode bridge. (and obviously rather large capacitors...)
For example Rod Elliott's project 117 uses dual rail 135V. [http://sound.westhost.com/project117.htm]
If one would modify this to work with a single rail 270V DC supply, would this transformer less option be viable?
Many transistors (including the MJL4281) can support up to 350V, so the maximum voltage ratings shouldn't be a problem...Any comments?
Regards,
Rene
I was just wondering if it would be possible to design a class AB audio amplifier which is powered directly from 220V AC via a diode bridge. (and obviously rather large capacitors...)
For example Rod Elliott's project 117 uses dual rail 135V. [http://sound.westhost.com/project117.htm]
If one would modify this to work with a single rail 270V DC supply, would this transformer less option be viable?
Many transistors (including the MJL4281) can support up to 350V, so the maximum voltage ratings shouldn't be a problem...Any comments?
Regards,
Rene
rbroich said:
If I'm not mistaken, it is an unwritten rule here that discussing direct powering from the AC mains is prohibited.
se
Indeedy-do. This sort of thing is DEADLY DANGEROUS. Although I have no personal objections to a Darwinian cleansing of the gene pool, inevitably it's someone other than the constructor who gets electrocuted. And I hate the idea of the inevitable lawyers shutting us down for allowing people to discuss things we know are insanely dangerous.- Status
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