Orange Squeezer compressor question

[ecoli]

Has anyone else built the orange squeezer compressor from the stripboard layout below?  I just did, and when I hooked up just the level pot, input and output jacks and a 9V battery, it seems to bypass the circuit.  The level pot works, but I don't seem to have any compression.  It still works even without the battery plugged in, again making me think it's bypassing the circuit.  Any thoughts/suggestions are appreciated.

[induction]

How did you set the trimmer?

[ecoli]

At first it was set at the midway point and I had no sound.  I turned it fully clockwise and had sound.  I'm scratching my head about that too, as I thought this was just for sustain? 

[Elijah-Baley]

WIth the trimmer you should get a spot with no sound t all until a distortion sound. The sweet spot is about in the middle, or a bit before you get distortion. Adjust as you prefer.
Try to do a research about the adjusting of the trimmer in this circuit, you should find some info about it.

[samhay]

>It still works even without the battery plugged in, again making me think it's bypassing the circuit.  Any thoughts/suggestions are appreciated.

That strongly suggests you have a build error. Does the volume pot work?

[ecoli]

Volume pot works fine.  Trimmer does....something.   It seems to act like an on/off switch.  I don't have a footswitch wired in, so not that.  I socketed the transistors, ic, and diode so I'll recheck their orientation and check to make sure everything else is where it should be.

[peterg]

Take a look at the debugging page - link is at the top left of this page.

An audio probe will help you out as well.

[ecoli]

Going through and debugging this currently.  So far things check out, but before I get too far into it maybe I should check and see if I'm doing something dumb.  While I've soldered all of the components to the board as per the layout, I have not soldered the pots, jacks or 9v power leads to the board.  I'm connecting them via breadboard (essentially have short lengths of wires soldered to the veroboard and connect them to the "external" components via the breadboard).  The layout makes sense, but maybe there's something about connecting it via the breadboard that's bypassing the circuit?  Just wondering if this is a no-no when testing completed circuits.

[induction]

The layout makes sense, but maybe there's something about connecting it via the breadboard that's bypassing the circuit?  Just wondering if this is a no-no when testing completed circuits.

That's not a problem as long as everything is connected correctly.

[samhay]

It shouldn't work without power. The signal goes through an op-amp, and these don't pass signal (at least in the non-inverting configuration used here) when they are not powered. What voltages do you measure around the op-amp and have you looked for shorts (e.g. solder bridges) between the pins?