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18th February 2005, 06:06 AM
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diyAudio Member
Join Date: Jan 2005
Location: Hong Kong
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OP Line Amp
Please comments on the attach simple IC line amp !
1) What will the performance, is it worth to build ? 2) The value of components ? 3)What will you think if the arrangement of U1 to U3 :- a) opa 134, opa134, opa134 b) opa 134, op637, opa134 c)op627, op 673, op 627 (because the data sheet show 627 has better performance with no gain) d) or any better choice ! (The price is great difference between 134 and 637 !!!!) 4) Can any one advise me some simple good O.P."Phono & Line" pre-amp schemtic & PCB layout ! Many Thanks ! 
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