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Frequency Central Raging Bull 3.0, Build Documentation

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Frequency Central Raging Bull 3.0 Build Documentation Download Page 2

 

Bill of Materials 

 

330R x 1 
470R x 1 
1K x 8 
2K2 x 2 
2K7 x 2 
10K x 3 
12K x 4 
15K x 1 
33K x 2 
47K x 3 
68K x 1 
100K x 7 
470K x 2 
2M2 x 1 
 

All resistors ¼ watt 
metal film. 

 
 

470pF x 2

 

10nF x 1

 

100nF x 5

 

220nF x 2

 

10uF electrolytic x 2

 

47uF electrolytic x 2

 

220uF electrolytic x 1

 

CA3046* 

TL072

 

LM13700

 

BC547 x 8

 

BC557 x 2

 

 

8 pin socket

 

14 pin socket

 

16 pin socket

 

 
 

A100K x 3

 

(or these)

** 

 

B100K x 3

 

(or these)

** 

 

B100K x 1

 

C50K x 1

*** 

 

1K trimmer x 2

 

100K trimmer x 2

 

 

SPDT toggle x 1

 

 

3.5mm socket x 7 

 

SPDT switch

 

 

Male 40 pin header

 

Female 40 pin header

 

10 pin box header

 

 

Big knob

 

Little knob

 

 

 
* CA3046 can still be got for some suppliers such as Banzai, Das Musikding, Small Bear and some 
reputable Ebay sellers. 

http://dsmcz.com/prestashop/en/

 sell UL1111 for only £1.53, they are 

functionally identical to CA3046. Alfa Rpar will shortly be releasing a CA3046 clone. The PCB also 
includes pads for SMD LM3046. 
 
** I prefer the Song Heui tall trimmers because they have a longer shaft and a white notch. 
 
*** If you can

’

t get C50K, use B50K instead 

 

 

 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for Raging Bull 3.0

Page 1: ...ignal will go to the VCA CV input unattenuated and the VCF CV input via the attenuator 2 By sending a gate into CV3 and setting the attenuator to zero the VCA can be gated while the gate has no affect on the VCF Key to PCB screen print n This signifies NPN BC547 transistors Note the correct pinout as shown by the half circles p This signifies PNP BC557 transistors Note the correct pinout as shown ...

Page 2: ...1 C50K x 1 1K trimmer x 2 100K trimmer x 2 SPDT toggle x 1 3 5mm socket x 7 SPDT switch Male 40 pin header Female 40 pin header 10 pin box header Big knob Little knob CA3046 can still be got for some suppliers such as Banzai Das Musikding Small Bear and some reputable Ebay sellers http dsmcz com prestashop en sell UL1111 for only 1 53 they are functionally identical to CA3046 Alfa Rpar will shortl...

Page 3: ...K 2 Solder all IC sockets 3 Solder all non electrolytic capacitors 4 Solder all transistors 5 Solder all electrolytic capacitors 6 Solder the power header if you re using box type observe correct polarity 7 Cut male headers to size and solder them into place Make sure that they stick out of the bottom of the PCB ...

Page 4: ...nting tabs at the rear of the PCB then place the panel over them This will assure that they are correctly positioned Flip the whole lot over and solder the pots into place 4 Cut female headers to size and solder them into place Make sure that they stick out of the bottom of the PCB Note Not all pots and sockets are equal in height Providing you use the ones in the links provided everything will li...

Page 5: ...e way to self oscillation Patch a 1V oct source into CV input 1 with the attenuator fully clockwise Play octaves and adjust the Scale trimmer until they are spot on 3 Freq trimmer you want to tweak this so that the filter is fully open when the Cutoff pot is fully clockwise 4 Res trimmer you can adjust exactly where the Emphasis knob starts to self oscillate If in doubt leave this trimmer in it s ...

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