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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

BPBP - Bruno Putzeys Balanced Preamp stopped working
BPBP - Bruno Putzeys Balanced Preamp stopped working
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Old 14th April 2019, 05:54 PM   #1
SomekPoland is offline SomekPoland  Poland
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Join Date: Mar 2011
Default BPBP - Bruno Putzeys Balanced Preamp stopped working

Hello,

I've built a BPBP some time ago, it worked perfectly foir a long time. When I moved in to a new flat I decided to put it in a chassis. My friend took it to take measurements for CNC and after assembly - it doesn't work.

The problem is a distorted sound. At first I thought I've made some bad connections, so I've taken the PCB back from chassis. Still nothing. Voltages seem okay on chips. As the issue is in both channels the only part that works in both is servo amp, so I removed it. Sadly, still nothing. Next step seems to replace all the opamps, but before I do that I'd like to ask about your opinions, maybe there is something I'm forgeting about?
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