duhvoodooman wrote:
Your build appears to have multiple resistor placement errors. First, it looks to me like you consistently switched the positions of the 1K (brown-black-black-BROWN-brown) and 10K (brown-black-black-RED-brown) resistors, of which there are four each. Additionally, you've got the three "FET mod" resistors misplaced; the most serious of these placement errors is the 3.9 Mohm resistor where the 27 Kohm resistor should be. This will drastically mis-bias the input JFET as well as severely reducing the input impedance of the circuit. These resistor errors need to be corrected, as well as cross-checking your other resistors against the diagram on page 7 of the GP instructions to make sure that there aren't other placement errors that I've overlooked.
Really? Huh... Thanks!
I honestly had great difficulty distinguishing the brown and red in my lighting with my eyes. And I'm not sure how I got the 27/3.9 backwards as I looked at that about 15 times before doing it. And looking again at the instructions: 27K is Red/Purple/Black/Red/Brown and 3.9 is Orange/White/Black/Yellow/Brown.
In the instructions, 27K is in the second spot from the edge; 3.9 is in the first spot... Looking at my build. I think I have those right, as the 3.9 is the only one with a white and yellow stripe... Maybe the instructions are wrong? Maybe my eyes really are that bad?
I'll look again tomorrow under some really bright light and see if I can spot the mistakes in the others.
I do not have a multimeter, nor have any idea how to operate one.
I completely redid the foot switch after taking the pics. I'll post a clearer one tomorrow maybe.
Thanks for the help and I'll let you know how I make out.