Velleman K4003, High-Q Velleman-kit K2543, K4400 Illustrated Manual
Total solder points: 45
Skill level :
Beginner 1þ 2o 3o 4o 5o Advanced
2x30W STEREO AMPLIFIER
K4003
Features:
þ The easy way to add quality stereo amplification to your project
þ Excellent sound quality
þ Low noise, low distortion
þ Short circuit and overload protected (1h max.)
þ On-board rectifier and smoothing capacitor
þ Just add a center tap transformer
þ Complete with heatsink
Specifications :
þ Max. output power : 2 x 15W/4 ohm - 2 x 10W/8 ohm
þ Harmonic distortion : 0.07% (1W/1kHz)
þ Channel separation : 70dB
þ Freq. response : 7Hz to 60kHz (-3dB)
þ Signal/noise ratio : 98dB (A weight)
þ Input sensitivity : 300mV / 20Kohm
þ Power supply : 2 x 12V / 2A (50W centertap transformer)
þ Dimensions : 69 x 51mm / 2.7” x 2”
modifications reserved
ILLUSTRATED MANUAL H4003P-ED1
5%
1
2
3
4
5
6
7
8
9
A
B
1%
COLOR= 2… 5
4K7= ( 4 - 7 - 2 - B )
4K7= ( 4 - 7 - 0 - 1 - 1 )
I P E SF S DK N D GB F NL
CODICE
C
COLORE
O
D
E
CODIGO
DE
CORES
CODIGO
DE COL-
ORES
VÄRI
KOODI
FÄRG
SCHEMA
FARVE
KODE
FARGE
KODE
FARB
KODE
COLOUR
CODE
CODIFICATION
DES
COU-
LEURS
KLEUR
KODE
0
Nero Preto Negro Musta Svart Sort Sort Schwarz Black Noir Zwart
Marrone Castanho Marrón Ruskea Brun Brun Brun Braun Brown Brun Bruin
Rosso Encarnado Rojo Punainen Röd Rød Rød Rot Red Rouge Rood
Aranciato Laranja Naranjado Oranssi Orange Orange Orange Orange Orange Orange Oranje
Giallo Amarelo Amarillo Keltainen Gul Gul Gul Gelb Yellow Jaune Geel
Verde Verde Verde Vihreä Grön Grøn Grønn Grün Green Vert Groen
Blu Azul Azul Sininen Blå Blå Blå Blau Blue Blue Blauw
Viola Violeta Morado Purppura Lila Violet Violet Violet Purple Violet Paars
C
O
D
E
0
1
2
3
4
5
6
7
Grigio Cinzento Gris Harmaa Grå Grå Grå Grau Grey Gris Grijs
Bianco Branco Blanco Valkoinen Vit Hvid Hvidt Weiss White Blanc Wit
Argento Prateado Plata Hopea Silver Sølv Sølv Silber Silver Argent Zilver
Oro Dourado Oro Kulta Guld Guld Guldl Gold Gold Or Goud
8
9
A
B
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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 :
þ Make sure the skill level matches your experience, to avoid disappointments.
þ Follow the instructions carefully. Read and understand the entire step before you perform each operation.
þ Perform the assembly in the correct order as stated in this manual
þ Position all parts on the PCB (Printed Circuit Board) as shown on the drawings.
þ Values on the circuit diagram are subject to changes.
þ Values in this assembly guide are correct*
þ Use the check-boxes to mark your progress.
þ 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.
1.3 Soldering Hints :
0.000
Mount the component against the
PCB surface and carefully solder the
leads
Make sure the solder joints are
cone-shaped and shiny
Trim excess leads as close as possible to the solder joint
3
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