thank you mr.audioguru. but can you please be more technical.the talking electronics site also didn't explain very well. i am a beginner.i am presenting this circuit as a project in my college. i have to prepare a documentation which explains each and every component. for example say transistor configuration used and why that particular config. is used, gain of each stage (approximately) like that. in viva voce they are going to shoot me with questions. so, please help me with this circuit as much as you can.
thanku once again for your reply.
warm regards,
deepak007