I will use FET, those isolated kind for first stage! then op. 5532 is too old and not good enough. High voltage I think will bring more noise. 071 fet op will be much better choice. ----- Original Message ----- From: "Rick C." To: Sent: Friday, June 07, 2002 5:29 PM Subject: Re: [EE]: need help with ECM > Any op-amp should work. NE5532 is recommended. Use +/- 18v to give you good > headroom. > Rick > > Tal Bejerano - AMC wrote: > > > Hi > > > > I need a very sensitive amp from condenser microphone to line. > > > > Does anybody have it on hand? > > > > I try to amplify with 2 staged 2N3904 somehow it's amplifying but the result > > is not good for me > > > > I need to listen to a room that even a whisper can be recorded. > > > > Thanks > > > > Tal Bejerano > > AMC - ISRAEL > > > > -- > > http://www.piclist.com hint: The list server can filter out subtopics > > (like ads or off topics) for you. See http://www.piclist.com/#topics > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.