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</o:shapelayout></xml><![endif]--></head><body lang=FR-CA link=blue vlink=purple><div class=WordSection1><p class=MsoPlainText><span lang=EN-CA>Hi everybody,<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>I need to replace a dead TDA2030 power amp in a small keyboard I have.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>The problem is that this IC is obsolete so I ordered some from an eBay Chinese seller..<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Fortunately I had some originals in one of my parts bin to compare with<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>the new Chinese to come..<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Then the TDA2030’s were delivered.. tested them.. Hmmmm.. bad news..<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>The genuine STMicroelectronics delivered clean 1khz sinewave on a 8 ohms load.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>The Chinese ones showed bad crossover distortion with 3rd harmonics with some oscillations<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>on the same load. I contacted the seller for a refund.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Looking <b>Pentawatt</b> cases of an original and the chinese's I saw differences.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>See both cases here:<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'><a href="http://www.arcenson.com/public/TDA20xx.jpg">http://www.arcenson.com/public/TDA20xx.jpg</a><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>eBay sellers don’t always show the real part package they will deliver to you<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>so I’m a bit scary to go there.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Does anybody have a good source for genuine TDA2030, 2040 and 2050 ??<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'>Thanks.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-CA style='color:black'><o:p> </o:p></span></p></div></body></html>