Which opamp in this preamp circuit?

[lordearl]

I recently dusted off this ebay-bought pcb I had sitting in a cupboard for a year or so. Whilst I do have the schematic (see pic below) and recall that the circuit uses 2SK170 and 2SJ74, I don't recall what opamp it was designed for. Is anyone able to assist?

 

[AndrewT]

Is it a single or a dual?
It needs to be unity gain stable.

 

[KatieandDad]

If in doubt build it with an IC socket.

Then you can swap Op-Amps without compromising the PCB tracks.

Use a nice gold-plated turned socket - they're not expensive.

 

[john curl]

I would use an AD825.

 

[lordearl]

Is it a single or a dual?
It needs to be unity gain stable.

Definitely single - there is one socket per channel

How did you determine it needs to be unity gain stable?

What is a good starting point for a unity gain stable DIP single channel opamp, which runs at +/-15v?

 

[lydlaug]

Hi

It seems to be the same schematic as on this one
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And they stated to use OPA627.