I had to take my perfectly healthy pos. ground FF and convert it to negative ground, so a friend could use it in his pedalboard with his power supply(all germanium PNP,btw).  I changed the board wiring, removed and added the jumper (JD's layout), reverse pol. of the input cap, and with fuzz control maxed, it makes this "motorboat noise". If I turn the fuzz pot to half it stops. While it's making this noise, you can hear the fuzz at least sound like it's working underneath it!  I get totally screwed up voltage readings on the trannies now, what am I supposed to read?

I've checked all my wiring 1000 times.. So therefore it has to be something stupid I forgot... I can build flangers and chorus's that work the first time, but I can't seem to keep this thing from kicking  my butt!

Has anyone ever experienced this, and have sollution?  

Please help!!