Transistor Voltage Chart

Transistor voltages (in the audio path) measured on two R4-F Forum-Vibe boards,
both running at 15.4 VDC at time of measurement.

 

Q1-Q9 = 2N5088
Q10 = MPS-A13

 
    Transistor         Collectorv        Basev   
   Emitterv   
Q1
2.03
1.33
.92
Q2
5.19
2.03
1.45
Q3
10.6
5.19
4.5
Q4
15.4
4.85
4.45
Q5
11.6
4.45
3.85
Q6
15.4
4.8
4.46
Q7
11.5
4.4
3.85
Q8
15.4
4.8
4.46
Q9
11.5
4.46
3.85
Q10
15.4
6.18
5.2

 

Note: voltages for the LFO transistors are not shown, they depend
on the transistor type and trim-pot settings.

Short video clip: "my vibe isn't vibing on the workbench.!"

 

Taming Power Supply Ripple (buzz)

The following three diagrams show various degrees of filtering to tame noisy wall-warts or poorly filtered power supplies:



 

 

(no further updates planned for these webpages)

 

 

 

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