Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › What Opamp for the Oatley K232 Valve Amp
New Posts  All Forums:Forum Nav:

What Opamp for the Oatley K232 Valve Amp

post #1 of 5
2/11/12 at 7:52am
Thread Starter 

A friend of mine here in Perth Australia just built me a beautiful Oatley valve amp.  This is the Oatley K232 valve amp with the 2 pentodes, uses 2xAA's to power the valves and a 9V to run the amp itself.

 

Sorry I am new to valve amps myself, though I've heard of them and seem them and listened to them but never really actually onwed one.

 

Now what I was planning to do in the future was to try a new opamp for this new Oatley K232 valve amp of mine.

 

So would like some feedback for those who have built this amp and what Opamp did you experiment or upgrade to.

 

I was considering probably the OPA 627.

Reply
post #2 of 5
2/11/12 at 12:59pm

Do you mean the K272A ?

 

The op amp in that amplifier is being used as an output buffer.

I would think that the NJM4556 would be a good place to start

for that role.

Reply
post #3 of 5
2/11/12 at 9:10pm
Thread Starter 

Sorry yes my mistake thats correct the K272A

Reply
post #4 of 5
2/11/12 at 9:12pm
Thread Starter 

Who manufactures this Opamp is AD, Burr Brown etc ?

Reply
post #5 of 5
2/15/12 at 8:13pm
Quote:
Originally Posted by Albinoni View Post

Who manufactures this Opamp is AD, Burr Brown etc ?


 

You are asking who makes the OPA627?

That would be Texas Instruments, you can have a look here:-> LINK

Reply
New Posts  All Forums:Forum Nav:
  Return Home
Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › What Opamp for the Oatley K232 Valve Amp