Debugging Super Simple Dual LFO

[mouldi101]

Hi!

My first post here, and my first time I've had a build go completely wrong, on something so alarmingly simple...

I've tried to build the Super Simple LFO, as drawn up by Experimentalists Anonymous on veroboard, with a few simple tweaks, and haven't had any luck.

http://experimentalistsanonymous.com/diy/Schematics/Oscillators%20LFOs%20and%20Signal%20Generators/Simple%20Dual%20LFO.gif
http://files.electro-music.com/forum/topic-30456.html

As for the differences from the original, the chip is a TL072, I switched out the pots as recommended here (http://www.diystompboxes.com/smfforum/index.php?topic=27948.0), the 1k became a 10k, and the 100k to a 1M (although it didn't work even before I did the pot value substitutions in exactly the same way).

I kept the trace intact between pins 3 and 6 to remove the need for one of the links on the veroboard given above to supply Vb to both sides

The very near to 100k resistor is 68k...

What I get is a static voltage on the output of 8.15v/4.19v depending on the position of the tri/sqr pot.

Pin voltages...
1: 4.36
2: 1.32
3: 4.45
4: 0
5. 1.38
6: 4.45
7: 1.52
8: 8.98

Any idea what on earth is going wrong with this? I'm assuming it's something incredibly obvious, but I'm just not seeing it!

Thanks in advance,

Andrew