background image

 

 

 

 

 

 

 

 

R1   :  100K   (1 - 0 - 4 - B) 

 

R2   :  100K   (1 - 0 - 4 - B) 

 

R3   :  100K   (1 - 0 - 4 - B) 

 

R4   :  100K   (1 - 0 - 4 - B) 

1. Resistors 

 

R...

 

IC1 :  8p 

 

 

2. IC socket, Watch the po-
sition of the notch!

 

 

 

AF IN (2x) 

 

AF OUT (2x) 

 

Power (+) 

 

Power (-) 

 

4. PCB pins

 

Construction 

 

 

RV1 : 220K (250K) 

6. Trim potentiometer 

 

RV...

 

 

C1 : 10µF 

 

C2 : 10µF 

 

C3 : 10µF 

 

C4 : 10µF 

 

C5 : 10µF 

5. Electrolytic capacitors.  
Watch the polarity !

 

C...

 

IC1 :  LM358

 

 

 

Pay attention 

to the 

 

position of 

the notch! 

 

7. IC mounting

 

 

 

 

 

 

 

 

 

R5   :  100K   (1 - 0 - 4 - B) 

 

R6   :  100K   (1 - 0 - 4 - B) 

 

R7  :  2K2 

(2 - 2 - 2 - B) 

3. Vertical resistors 

 

R...

Summary of Contents for K1803

Page 1: ...a number of audio applications where there is insufficient input signal Applications as a microphone pre amplifier or for level correction UNIVERSAL MONOPREAMPLIFIER Specifications Power supply 10 30...

Page 2: ...VELLEMAN NV Legen Heirweg 33 9890 Gavere Belgium Europe www velleman be www velleman kit com...

Page 3: ...s Needle nose pliers for bending leads or to hold components in place Small blade and Phillips screwdrivers A basic range is fine For some projects a basic multi meter is required or might be handy 1...

Page 4: ...solder joints are cone shaped and shiny 3 Trim excess leads as close as possible to the solder joint REMOVE THEM FROM THE TAPE ONE AT A TIME You will find the colour code for the resistances on our w...

Page 5: ...e notch AF IN 2x AF OUT 2x Power Power 4 PCB pins Construction RV1 220K 250K 6 Trim potentiometer RV C1 10 F C2 10 F C3 10 F C4 10 F C5 10 F 5 Electrolytic capacitors Watch the polarity C IC1 LM358 Pa...

Page 6: ...t is taken on the connection AF OUT and the ground To connect your in and output you d better use a screened wire this to avoid interferences and rumble With the trimmer RV1 you can control the output...

Page 7: ...7 9 Schematic diagram Schematic diagram PCB R4 100K R3 100K R2 100K C1 10 GND V C2 10 C5 10 SK1 AF IN SK2 AF OU T 3 2 8 4 1 IC1A 5 6 7 IC1B C3 10 C4 10 R7 2K2 R6 100K R1 100K R5 100K RV1 220K 10 PCB...

Page 8: ...Modifications and typographical errors reserved Velleman nv H1803IP 2010 ed 2 VELLEMAN NV Legen Heirweg 33 9890 Gavere Belgium Europe 5 4 1 0 3 2 9 4 3 4 9 7 7...

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