Velleman High-Q Kit K1803 Manuel utilisateur

UNIVERSAL MONO PREAMPLIFIER

K1803

ILLUSTRATED ASSEMBLY MANUAL H1803IP-1

Total solder points: 29

Difficulty level: beginner 12345 advanced

Thiskithasbeendevelopedaspre-modulefor

anumberofaudioapplicationswherethereis

insufficientinputsignal.Applicationsasa

microphonepre-amplifierorforlevelcorrection.

SPECIFICATIONS:

 Power supply: 10-30VDC / 10mA.

 Output impedance: 1Kohm.

 Adjustable output level: max. 40dB.

 Frequency range: 20Hz to 20kHz ± 3dB.

 Max. input signal: 40mV.

 PCB dimensions: 30 x 44mm (1.2" x 1.7").

Features & Specifications

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 oftenon 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 goodconnections. 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. Alwayslook for possible last minute manual updates, indicated as ‘NOTE’ on a separate leaflet.

0.000

Assembly hints

1.3 Soldering Hints :

1- Mount the component against the PCB surface and carefully solder the leads

2- Make sure the 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 !

AXIAL COMPONENTS ARE TAPED IN THE

CORRECT MOUNTING SEQUENCE !

You will find the colour code for the resistances and the LEDs in the HALG

(general manual) and on our website: http://www.velleman.be/common/service.aspx

 R1 : 2K2 (2 - 2 - 2 - B)

 R2 : 220K (2 - 2 - 4 - B)

 R3 : 22K (2 - 2 - 3 - B)

 R4 : 22K (2 - 2 - 3 - B)

1. Resistors

R...

 IC1 : 8p

4. IC socket, Watch the po-

sition of the

 AF IN (2x)

 AF OUT

 +

 -

5. PCB pins

Construction

 RV1: 1K

2. Trim potentiometer

RV1

 C1 : 10µF

 C2 : 1µF

 C3 : 1µF

3. Electrolytic capacitors.

Watch the polarity !

C...

 IC1 : UA741M

 Pay attention to the position

of the notch!

6. IC mounting

7. Connection

Connection

 Connect a stabilized supply between 10 and 30V with the points “+” and “-” on the print.

 The input is connected on the points “AF IN”.

 The output is taken between the outer right connection “AF OUT” and the mass “-”.

 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 signal between 0 and max.

AF OUT

AF IN

IC1

RV1

10 - 30V DC

Dynamic microphone

Telephone pick up coil

Max. 40mV

Etc... +

+Amplifier

Mixing panel

Tape recorder

Other application

TO :

INPUT OUTPUT

Connection example

8. Schematic diagram.

Schematic diagram & PCB

22K

2K2

220K

1µF

10µF

1µF

RV1

GND

IC1

741

AF IN

AF OUT

AF IN

IC1

RV1

9. PCB

Modifications and typographical errors reserved

H1803IP - 2004 - ED1 (rev1)

VELLEMAN Components NV

Legen Heirweg 33

9890 Gavere

Belgium Europe

www.velleman.be

www.velleman-kit.com

5410329 310318

X-ON Electronics

Largest Supplier of Electrical and Electronic Components

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