Jfet biasing issue- Lemon Rockerverb preamp

megatrav

Well-known member
I am almost finished with this build. I am currently working on biasing the jfets. I am able to get all of them set to right at 4.5v except the first one. Using the trimpot, I am only able to get around 8.3v- 9.8v throughout the whole turn. Would this indicate an issue with the Jfet itself or something else? The only other thing I can think of is the trimpot could be the wrong value?
I am using SMD JFETs with a conversion board from pedal pcb. If it is a Jfet I have others to test, but I thought it would be worth asking you fine folks.

Here is a link to the documentation Lemon Rockerverb
Any help is appreciated!
RV schematic.PNG
 
Last edited:
Turns out I did switch the trimpots. I was able to bias the transistors!
Unfortunately I don't have any sound so I will be trouble shooting that tonight
 
Back
Top