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Green Mic Pre
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        Green Microphone Preamp

 
The Green pre finally arrives! I like the sound of this unit very much, & it's easy to do.

For high res pictures, right click & save to disk
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green_pcb_side.gif
Size is 125 mm x 59mm

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C1,2   100uF /63v Electrolytic

C3      1nF

C4,5   22uF  Electrolytic

C4a, C5a 0.1uF Poly

C6, C7, C9 22pF

C8     150pF 

C10   10pF

C11,C12  100uF Elctrolytic

C11a, C12a 0.1uF poly 

C13   47uF Electrolytic

C14  4700uF /6v Electrolytic

C15  10uF 63v Electrolytic

C1a,C2a .1uF

4  x 47uF Elctrolytics PSU Decoupling caps

D1,D2,D3, D4  15v Zener

 F1,F2 Ferrite Bead

 

Q1, Q2 BC550C

R1,R2,R5,R12,R20,R21 10k

R3,R4  47k

R6,R7,R17,R18,R19  2k2

R8,R9  1k5

R10a 680R  R10b 500R trimmer

R11  1k

R13,R16,R36  100R

R14,R15  100k

R22 150k

R23  2k7

R24   820R

R25   330R

R26  150R

R27  68R

R28  33R

R29  15R

R30  8R2

R31  3R9

R32  2R

R33  1R5

R34,R35   6k8

R36  100R

4 x 10R PSU Decoupling resistors

U1 NE5532 DIP8

U2 NE5532 DIP8