Velleman K1803 Illustrated Assembly Manual Download Page 3

Assembly hints 

1. Assembly  (Skipping this can lead to troubles ! ) 

Ok, so we have your attention.  These hints will help you to make this project successful.  Read them carefully. 

 

1.1 Make sure you have the right tools: 

 

• 

A good quality soldering iron (25-40W) with a small tip. 

 

• 

Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to the tip, to give it a wet look.  This is called ‘thinning’ and will 
protect the tip, and enables you to make good connections.  When solder rolls off  the tip, it needs cleaning. 

 

• 

Thin raisin-core solder.  Do not use any flux or grease. 

 

• 

A diagonal cutter to trim excess wires.  To avoid injury when cutting excess  leads, hold the lead so they  

cannot fly towards the eyes. 

 

• 

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 

 

1.2 Assembly Hints : 

 

 

Make sure the skill level matches your experience, to avoid disappointments. 

 

Follow the instructions carefully.  Read and understand the entire step before you perform each operation.  

 

Perform the assembly in the correct order as stated in this manual 

 

Position all parts on the PCB (Printed Circuit Board) as shown on the drawings.  

 

Values on the circuit diagram are subject to changes. 

 

Values in this assembly guide are correct* 

 

Use the check-boxes to mark your progress. 

 

Please read the included information on safety and customer service 

 

* Typographical inaccuracies excluded. Always look for possible last minute manual updates, indicated as ‘NOTE’ on a separate leaflet.  

 

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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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