What is this Op-amp?

[steve_rb]

I have the attached circuit but don't know what is the IC1 (48k operational amplifier). It is a very old circuit and I need help to find it or a replacement for it. Any idea what is
this Op-amp and where to find one? Or what can be a good replacement for it?



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Following is the complete list of parts in case if it is required:

 

[barry]

Since this is a "very old circuit" I would suspect that any modern opamp would suffice, as long as it met the requirements of +/-15 volt power supply and could run at 2MHz. Since there are no pin numbers on that schematic, it's impossible to suggest ANY replacement.

 

[schmitt trigger]

In those old, old days, monolithic opamps with good performance specifications were simply not available.
Therefore hybrid modules -much like what Philbrick Research used to make- were employed in those instances.
And, if you see the outline for IC1, you can see that it is a large square.....exactly what a potted hybrid would look like.

 

[pradeep.g.belchada]

use lm358 configure the pins as per your needs

 

[barry]

use lm358 configure the pins as per your needs

Nope. The LM358 will NOT work.

1) It's only got a unity gain BW of 0.7MHz
2) It doesn't have an offset adjustment.
and
3) I think pradeep is on the right track, this is a hybrid.

 

[schmitt trigger]

"3) I think pradeep is on the right track, this is a hybrid."

Schmitt trigger....:wink: