Befaco A*B+C Owner's manual

Type
Owner's manual

Befaco A*B+C is a compact dual voltage controlled amplifier (VCA) and mixer. It features two VCAs with independent CV inputs, allowing for precise control over the amplitude of two audio signals. The mixer section combines the two VCA outputs, providing a convenient way to blend and mix signals. With its versatile design, Befaco A*B+C is suitable for a wide range of applications, from basic level control to complex signal processing and modulation.

Befaco A*B+C is a compact dual voltage controlled amplifier (VCA) and mixer. It features two VCAs with independent CV inputs, allowing for precise control over the amplitude of two audio signals. The mixer section combines the two VCA outputs, providing a convenient way to blend and mix signals. With its versatile design, Befaco A*B+C is suitable for a wide range of applications, from basic level control to complex signal processing and modulation.


THANKS FOR CHOOSING ONE OF OUR KITS!
 !"#"" $#%&''#'"(#)#'*"++*#''+*!!*#  '"'%*,'#-#./*/
0/&#+#*&%*&( */ *&.&#%+'+*!/*##' "&/"+.*#'$*"&. 
!"#''*!"(" !$" " " /* $
*! '/ "&#*'*$* 1 *#,*2&"#0/&#+.&/" &".' '/ 
'*&*)$,*& '"&'#)
,'  *&-& '/&*3+'1/" &".' "&'+$,*&* '"&'" !$#)'('4
%%%$,"+**&)5*%'*5
GOOD LUCK!
MAIN PCB 6789:
OPEN MAIN BOARD BAG A
RESISTORS
Qty Value Code Name on PCB
; <( *%=&/1$"+(1&.1$&*%# 1>1?11@11;1A1
1@1B1;1;;1;>1
;?1A1A1A;1AA1A
? ( &*%#1$"+(1$"+(1&.1$&*%# A1B1>1;1;B1A>
< < *%=&/1$"+(1*%11$&*%# <11;@1A<
; >?( &#1$1$"+(1&.1$&*%# ?1;A
; A(A 8&"#)1*&"#)1$"+(1$&*%#1$&*%# ;1A?
; ?<B( 1*%1%'1&.1$&*%# <1;<
 AA( 8&"#)18&"#)1"+(18&"#) ;
DIODES
*.&'.*. observing their polarity$"+(*&%'#*#'.*.! '
!"'+%''%'#*#'.*. !$**#'= ( +&#
C' D" 9"!*#=
; 9>@ 1;
[CONTINUED ON NEXT PAGE]
1

OPEN INTEGRATED CIRCUITS BAG
ICs
E& ' place the sockets6'"(#)+"&'**&#'"''!/&*/&'#*'+*&.*'*#*#
#.*,' *.!"'+'!")*#' ( +&#:"#. *.&'!#'*'&+*&&+'
/* '*# 
90'/"+' #'&& /+' *+(' 6")"#'"(#)#*'*,'&*&#'"'*#'
#*'+*&.*'*#''*/*,'! '!"'+'"'*,' *+('"#. ( +&#:
MAIN PCB
C' D" 9"!*#=
; ?AA9 ;1A
; < 1<
CONTROL PCB
 ; 
OPEN MAIN BOARD BAG B
CAPACITORS
.#',#)+"/"+'*& +"#$F''&+(*.  '"'."&#.+"'1/" '"("**("'
' ).,*&/.#',#)+"/"+'*& 4''/455%%%%(*%+*!5".""/"+'*&
C' D" *. 9"!*#=
 # < 1A1<1>1?1B111;1
<
; ;;/ ;; ;1A
ELECTROLYTIC CAPACITORS
D" "&%&''#*#' .*,'+"/"+'*&#.'&/*"&'6*#))*,'
+"/"+'*& '/* '6::
C' D" *. 9"!*#=
; GE GE 1@
MALE PIN HEADERS
="+"#. *.&'!"/#".& "'H9IJH9I%&' ( +&##.+"' 6'
 ' *&'&/# '"'*"& *.&#):
2

POWER CONNECTOR
*.&'/*%&+*##+'*&"'H=8KI1# &#)' ,"+#)*',&*!'.)*,'=
 !""&&*%*#'+*##+'*& ! '$*#' .%'''+(%'#
CONTROL PCB
OPEN CONTROL BOARD BAG A
RESISTORS
C' D" *. 9"!*#=
? ;;( .1&.1$"+(1&.1$&*%# A1<1>1?11
; >(A? &#1*&"#)1$1$&*%#1
$&*%#
;1 Make sure this resistor is
sitting as at as possible so that one leg
doesn’t touch o the power connector when
the PCBs are connected,
; A( 8&"#)1$"+(1$"+(1$&*%#1
$&*%#
1@
; ( &*%#1$"+(1$"+(1$&*%#1$&*%# 1B
OPEN CONTROL BOARD BAG B
FEMALE PIN HEADERS
="+',!"/#".& *&' ( +&#!"&(#) "'/* '*# H898IJ
H898"#. *.&
SPACERS
+&' /"+&*#'**#'&*=6'&*)'*%' &*'#:%''!"#$*.
*,' /"+&*#'+*!/*##' .1"#.'#'*#'*//* '
FRONT PANEL COMPONENTS MOUNTING TIPS:
9*%%%/&*+.'*!*#''3"+( 1"#./*'#'*!'&  /"&'*,'" !$ 
=" '"(*&'!"#.&".',**%#)# '&+'*# +"&,
 +*!/*##' ! 'NOT$ *.&.#''"&/"+.*#'="#.,"''"+.
'*',&*#'/"#
&"&'%*&" *# ,*&' 4
)'*,'/"#+*!/*##' "&#*'"' "!+" *,' 1,#*'
"''"+./&*/&$,*& *.&#)1'%#*' '"/&*/& "'.")"# ''/"#
 !)'+" !+"#+" '& &.+#)'&,0/+'"#+"#.#'%*& '+" 
+" '!'*$&"(
 +*#.&" *# '"'' &.L+''*")#'+*!/*##' '*'* ,'
/"# #*'/* '*#./&*&'* *.&#)#'+" *,' 1'"&"!* '
!/* $'* ''*'+*&&+')'%'*'&,&#+'*',&*#'/"#
3

POTENTIOMETERS
="+'/*'#'*!'& *#'=*#*'/"+'!"'%".*%#1" ' *.$
' "!)" !#3"+( "#.don't solder it yet!
C' / 9"!*#=
< #)6A/#:M NN1NN;1NN1NN;
OPEN MINI-JACKS BAG

MINI-JACKS
="+"'!#3"+( *#'*'=# &#)'"&*#' ( +&# .1$'don't
solder yet
Caution:' %'+#'"#.'3"+(#' **(' "!1$''"&#*'F" O."#.
%#*'-'#"+*'& 2'&".1 *!"( &'*(/'! /"&"'P

LEDs
="+' *#'*'=!#.#)1'&/*"&'1$'don't solder them#'',&*#'
/"# #/"+  '*#%"'* *.&'!#'&)'/* '*#
*#)) '/* '"#.' *&''#)"'8#'=' F"&/".#.+"' 
'#)"' ."#.'& " !$*'*#.+"''/* '
C' 9"!*#=
; N1N;
[CONTINUED ON THE NEXT PAGE]
4

FRONT PANEL
''"+' front panel".3 '#)'/"&' *#$*#,#+ "&#''-''' /*#'
"/"&*,-#'%O& +"#$/,
*-# 4
+&'/"&' '*'/"##' *&.&4: Mini-jacks : Pots
# &#)"*,'"$*/"&' "&5ush with the panel   +&'+"1" /*' 
!)' *&'+*!/*##' $#.'!# *+"#-#"solder'!"P
90'1".3 '' LEDs *'"''"&Q %''/"#"#. *.&'!
 *##+''main PCB'*'control PCB$'&".#)'A +&%'&*)'
!"#="#. +&#)'!'*' /"+&!"#= *.$*&#'"'. *'"''
+*!/*##' . ,"+#)'*%"&. ',&*#'/"#
='' knobs*#'/*'#'*!'& 
*##+'' power ribbon cable4&.%&6;D:*#'/*%&&$$*#+"$
+*&& /*#. '*/##!$&*#*#'!"/*%&+*##+'*&#!$&*#/# 
#.+"'.%'" !"'&"#)*#'!"/*%&+*##+'*&"#."%'#*#'!"#
=%'*&$"+(#6*&H;I:!"&(.*#*&/*%&$ #*&!"#.+"' '
+*&& /*#.#)/#
ENJOY YOUR NEW BEFACO MODULE!
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Befaco A*B+C Owner's manual

Type
Owner's manual

Befaco A*B+C is a compact dual voltage controlled amplifier (VCA) and mixer. It features two VCAs with independent CV inputs, allowing for precise control over the amplitude of two audio signals. The mixer section combines the two VCA outputs, providing a convenient way to blend and mix signals. With its versatile design, Befaco A*B+C is suitable for a wide range of applications, from basic level control to complex signal processing and modulation.

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