Hello to all,
I built the pyrocumulus fuzz, but I have a litle problem here, the vc in q2 ( or q3, the second stage from the input) is low, like 1,2 v, isnt in line with the usual 4,5v. The rest of the stages are properly biased at 4,5v.
This circuit is directly "inspired" by the dice works muff diver, and in this particular design there isnt the usual resistor to ground from the base of the q2...
Anyway, I checked the board, resolder all, checked all the values of resistors in this stage and all is right. The funny thing is that I used the big muff bias simulator of diystompboxes, https://www.diystompboxes.com/biascalc/bmbias.html and with this particular values my vc of 1,2v is right¡¡¡ I am using bc549c with and hfe of 420 aprx.
If I put a transistor with a hfe of 100 the vc up to 4 v (this is a normal behaviour with transistor)
Is this circuit designed so q2 is biased low??...but its too low¡¡ I think with this readings the transistor isn working properly
Thanks in advance
I built the pyrocumulus fuzz, but I have a litle problem here, the vc in q2 ( or q3, the second stage from the input) is low, like 1,2 v, isnt in line with the usual 4,5v. The rest of the stages are properly biased at 4,5v.
This circuit is directly "inspired" by the dice works muff diver, and in this particular design there isnt the usual resistor to ground from the base of the q2...
Anyway, I checked the board, resolder all, checked all the values of resistors in this stage and all is right. The funny thing is that I used the big muff bias simulator of diystompboxes, https://www.diystompboxes.com/biascalc/bmbias.html and with this particular values my vc of 1,2v is right¡¡¡ I am using bc549c with and hfe of 420 aprx.
If I put a transistor with a hfe of 100 the vc up to 4 v (this is a normal behaviour with transistor)
Is this circuit designed so q2 is biased low??...but its too low¡¡ I think with this readings the transistor isn working properly
Thanks in advance