Adding a buffer to an orange squeezer on the empty amp

[spargo]

I'm breadboarding an orange squeezer using an OPA2134PA opamp.  I have it all built.  I will have this as an always on effect, and want to add an output buffer since this will be at the beginning of my board.  All my effects are true bypass and I already have an AMZ buffer at the end of my board.

Is an output buffer the best way to go?

I assumed that I could simply add on another AMZ buffer after the orange squeezer in the signal but using the unused side of the opamp from the OS.  So I put the buffer on the same OPA2134 running out of pins 1,2, and 3, routed the output of the OS to the input of the buffer, and it sounds AWFUL. Super distorted and messed up.  I assume I did it wrong?  Any ideas?

[Hides-His-Eyes]

I don't think you need a buffer if the compressor's always on...

[aziltz]

an input buffer would help that circuit more.

[spargo]

So if the compressor is always on, but the rest of my true bypass effects coming after it are off, you don't think an output buffer is necessary for the trip through the board? (about 10 TB pedals).

[ayayay!]

an input buffer would help that circuit more.

Yes, but before you go starting on the input buffer, there is the topic of the "swelling" effect that happens sometimes in OS builds.  I searched for over an hour looking for the post Mark Hammer (I think it was Mark) had a year or so ago...  It explained why it happened very well but I can't find it.  IIRC the gist of it was that a SPDT a la Crybaby (switching the outputs only) might be a better solution... man I wish I could find that...

Anyway, the output impedence of that pedal is pretty low, so it is already kinda akin to a buffer.  

What I'm saying, for what it's worth, is that I was more than satisfied just using the OS stock and had no problems using it as my "compressor/buffer" for quite some time...  until it started humming badly one day...  hmm, need to get that one running again.

[aziltz]

How switching the outputs only would ever be a Better solution is beyond me. This thing has a lower input impedance, so if your planning to only switch the outputs, you should add an input buffer. Otherwise you might be a bit disappointed.

[spargo]

As far as switching goes, I'm planning on not having one.  This is going into a 1590A whether it likes it or not.  Since I'll always have it on, I figure why bother with a switch?  So if that changes anybody's opinion...looks like an input buffer is the best choice.

[ayayay!]

How switching the outputs only would ever be a Better solution is beyond me. This thing has a lower input impedance, so if your planning to only switch the outputs, you should add an input buffer. Otherwise you might be a bit disappointed.

Oh no no, I think you misunderstood me.  I agree an input buffer would be a fine addition.  But the way an OS is designed it has to pull up voltage in a true bypass setup.  Sometimes it's quick and completely unnoticeable.  But for some users, it has a "swell" that pops up as soon as you switch it on, and I was trying to find that old post on it.  I mean, maybe an input buffer would even eliminate that.  I don't know.  I'm just saying. 

I say go for it any way you want Spargo.  Have fun with it!