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Does anyone know where i can get an Mj earmax clone pcb???? - Page 2

post #16 of 19
5/6/08 at 8:06pm
Nice build!

Fran.

Indikator: if you are really asking if you would be safe just by sitting on a bed, then I think you need to do some serious learning about handling live mains/high voltages before attempting a build. It doesn;t take that much to stop a heart beating. A decent run of DC at 300V will do it at 15mA.
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post #17 of 19
5/7/08 at 12:32pm
yeah I very newbie about EE, care to give some advice

vvs_75 thank god you’re here, got a lot of question already
first one, about power supply, why use low VAC power then step up it to 230VAC, can we just use wall socket instead, then the diode bridge can use diode? and then where did you connect all the ground to?

btw yours is a very tidy work
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post #18 of 19
5/7/08 at 3:20pm
Quote:
Originally Posted by indikator View Post
vvs_75 thank god you’re here, got a lot of question already
first one, about power supply, why use low VAC power then step up it to 230VAC, can we just use wall socket instead, then the diode bridge can use diode? and then where did you connect all the ground to?
there have been "mains coupled" amps before. never for headphones AFAIK.

it is risky business, and should really only be attempted for speaker amps that will not frequently be moved. even then, the safety is often questioned.

unless i am mistaken, VVS_75's amp used a transformer with a dual output. IE: HV and 6.3v
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post #19 of 19
5/7/08 at 5:29pm
looks good! I love the $200 worth of S102s
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