Problems with JO's Mini-Booster

[orangedrop]

Hi,
I've built Jack Ormans Mini-Booster (on the org. supplied circ. board)  and I can't make it work. It's a very simple DIY so I'm very frustrated.
I've built a couple of amps, modded more and also built and modded quite a few effects. -So, I'm not completely hopeless but not very good in electronics - more of a mechanic.

I measured Q1 and Q2 using a 9,4 V battery:
Q1: D=4,3 V, S=0V, G=0V
Q2: D=9,2V, S=4,3V, G=4,4V

I suppose I've done some stupid mistake - but WHAT???
The only difference from the original is that I used tantal caps on C3 and C4 (observing polarity).

Any input is VERY appreciated! 

[Jered]

  Any sound at all? What FETs are you using? Check the pinout again, just to be sure.
  Jered

[petemoore]

Q1: D=4,3 V, S=0V, G=0V
Q2: D=9,2V, S=4,3V, G=4,4V
  ..assuming Q1 is the transistor used for gain, Q2 used as bias for Q1 drain.
  The Drain source connection at 4.3 is sort of between the supply rails.
  but Q1 as Jfet gain transistor needs it's source biased above the gate, I would test the restistance between source pin on the transistor and ground, same for measuring gate bias resistor, anyway, something around the bottom source connection is what looks like a good place to start.

[Jered]

  Yes, the source of the bottom FET should be around  .3 vdc
  Jered

[orangedrop]

Thanks for your replies. I'll try. It's such a simple layout - makes it frustrating.