VELLEMAN NV
Legen Heirweg 33
9890 Gavere
Belgium Europe
www.velleman.be
www.velleman-kit.com
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...
