comradehoser
Well-known member
Build #6 is the problem child.
Issue: attenuated fuzz, very low volume. Doesn't quite get to unity with volume pot cranked.
Q1: bc107 w/hfe 398
Ie: 2.4 mA
Ube: 640mv
Q2: bc109c w/hfe 674
Ie: 3.2 mA
Ube: 663 MV
Q3: Polish oc140 clone
Hfe: 76.2
Ic: 1.0 mA
Ube: 71mV
ICEO: 0.20m
Maybe someday somebody will explain to me the significance of those measures and how to figure leakage.
What I've done: reflowed all solder points including offboard, recleaned board, rechecked components, swapped r4 15k from 1/8w to 1/4w, replaced Q3 and D1. No dice.
Readings:
9V in: 9.38v
Q1:
c: 3.978
b: 0.626
e: 0.033
Q2:
c: 3.992
b: 0.688
e: 0.050
Q3:
c: 0.310
b: 0.184
e: 0.002
D2 is sending 4.51v.
please assist this poor lost Canadian in making his nice fuzz
Issue: attenuated fuzz, very low volume. Doesn't quite get to unity with volume pot cranked.
![IMG_20240429_210210192.jpg IMG_20240429_210210192.jpg](https://forum.pedalpcb.com/data/attachments/74/74101-5aa608e3d280d2698ff200b5932d341a.jpg)
![IMG_20240429_210118787.jpg IMG_20240429_210118787.jpg](https://forum.pedalpcb.com/data/attachments/74/74102-0c6ccfe79ade2bcdbfde66a9b90a4b27.jpg)
![IMG_20240429_210109453.jpg IMG_20240429_210109453.jpg](https://forum.pedalpcb.com/data/attachments/74/74103-14a1b0679748757f7306e432ead3a6cb.jpg)
Q1: bc107 w/hfe 398
Ie: 2.4 mA
Ube: 640mv
Q2: bc109c w/hfe 674
Ie: 3.2 mA
Ube: 663 MV
Q3: Polish oc140 clone
Hfe: 76.2
Ic: 1.0 mA
Ube: 71mV
ICEO: 0.20m
Maybe someday somebody will explain to me the significance of those measures and how to figure leakage.
What I've done: reflowed all solder points including offboard, recleaned board, rechecked components, swapped r4 15k from 1/8w to 1/4w, replaced Q3 and D1. No dice.
Readings:
9V in: 9.38v
Q1:
c: 3.978
b: 0.626
e: 0.033
Q2:
c: 3.992
b: 0.688
e: 0.050
Q3:
c: 0.310
b: 0.184
e: 0.002
D2 is sending 4.51v.
please assist this poor lost Canadian in making his nice fuzz