I built the BJT Discrete Buffer from General Guitar Gadgets and for some reason it wont work! I have tried it with an effect after it, by itself, etc.
Heres the schematic:
http://www.generalguitargadgets.com/pdf/ggg_buffer_bjt_sc.pdf
I used a 2N5089 like they said. Heres my readings:
Battery: 8.24V
C: 8.24V (This is connected straight to the battery +)
B: 7.05V
E: 8.16V
Maybe a misbiasing, but I dont know about BJTs and biasing... Whats going on?
It is indeed misbiased.
"Bias" is just a fancy word for setting things to be ready for the expected signal - not too much current or too little, not too much voltage or too little. Just right.
In this case, just right means half of the battery voltage on the base. The two 220K resistors are intended to divide the battery voltage in half and apply that to the base. Your battery is 8.24V, so the base should be at 4.12V. Instead, it's at 7.05V. That puts too much voltage on the base, too much current through the emitter, and so there is no voltage swing left to do any signal you stick in.
I think that you have a soldering or component placement problem. Measure the voltage at the junction of the two 220K resistors - is it half the battery? If not, you have to correct that first.
It may be that there's a bad connection to the base, or the emitter may not be connected through its resistor to ground.
Fixed it. Input and transistor were connected to the wrong places :icon_mrgreen: