AMZ booster not working right

[wademalorgan]

Hello!
I have been trying to get the amz mosfet booster (tonepad layout) to work for hours now.  Signal passes through but there is a decrease in volume, not a boost.   turning the 5k pot clockwise decreases the volume (strange)- at its highest volume it is still lower than the bypasses signal.
Do these voltages look right?
v=10.03
d=4.69
g=3.94
s=4.69
vr=5.99
"point a"=5.50
any help would be greatly appreciated
thanks yall
wademalorgan

[petemoore]

  First thing that sticks out is the D and S voltages are the same, check for a short between D/S.

[wademalorgan]

crap, i messed up
s=5.21
g=3.94
d=4.69
sorry

[petemoore]

s=5.21   high voltage, there should be a small resistorance to ground?
g=3.94 
d=4.69
  of 10.03, somehow the drain came out in the ballpark..
  Measure every resistors resistance, start from ground, V+, compare measurements with schematic.
  Pick a 'distant' ground point, like an offboard ground wire, test all ground points.

[amz-fx]

The gate should be about 2v higher than the source.   You have something placed wrong.

Did you check the transistor pin config?  This is the most common error.

regards, Jack

[wademalorgan]

I double checked the transitor pinout and it is correct.  Could it be a bad resistor? possibly the 10m?

w

[MikeH]

I'm actually having the same problem with mine right now.  Are you using a BS170 from small bear?  I've found plenty of BS170 datasheets, but I don't know which company makes the one I have.  Very frustrating...

[markm]

Pinout could be an issue.
All of the BS170's I have are SGD.