BJT opamp suitible for line receiver

5v333 said:

im planning a little mod jobb on one of my EQs.

it has a simple 4resistor balanced line receiver on the input. each resistor is 5k1.

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would an opamp with BJT input be suitible for thoose resistances? or would jfet be better?

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5v333 said:

Thanks guys!!!

I think i am missing the point of my own question...

Ive read that bjt opamps works better around lower impedances. But is it because of current noise or stability that this is said?

Im planning on replacing the opamp - which is a op275 - with a lme49860. Its Voffset is almost ten times lower so i hope i can remove a couple of elyt blockingcaps after it.

Im not sure yet but i think the supplys are +-24v. So my candidates are few.

And theres already sockets installed with all opamps so it will be a little easier replacing them.

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5v333 said:

thanks again for the advice!

il have a try with the lme opamp. perhaps in other positions aswell.

as said here, the difference wount be night and day. more like a polishing effect. good enough!

there is actually blocking caps on the inputs. if there is no sine of dc on the inputs i might remove them aswell. but keeping them feels good aswell for security reasons in case there is failure outside the box.

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