UNIVERSAL STEREO PRE - AMPLIFIER K2572 boo amplifier to re p e is o n Low als.
Features & Specifications Specifications: Power supply: 10 - 30V DC maximum, stabilized. Current absorption with out charge : typ. 5mA. Adjustable gain : 40dB max. Frequency range : 40Hz - 30KHz (-3dB). Output impedance : 1KΩ. Max. Input voltage : 50mVrms (500mVrms) Dimensions : 44 x 65mm / 1,7” x 2,6”.
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.
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 ! DO NOT BLINDLY FOLLOW THE ORDER OF THE COMPONENTS ONTO THE TAPE.
Construction 1. Resistors 3. Ceramic Capacitor 5. Potentiometers R... RV1 : 1K RV2 : 1K C ... R1 R2 R3 R4 R5 R6 : : : : : : 22K 22K 1MΩ 1MΩ 10K 10K (2 - 2 - 3 - B) (2 - 2 - 3 - B) (1 - 0 - 5 - B) (1 - 0 - 5 - B) (1 - 0 - 3 - B) (1 - 0 - 3 - B) 2. IC socket. Watch the position of the notch! C4 RV... : 100nF (104, u1) 4. Electrolytic capacitors. Watch the polarity ! C1 C2 C3 C5 C6 C7 C8 : : : : : : : 10µF 1µF 1µF 1µF 1µF 1µF 1µF C... 6 . IC.
Use 7. Use Ten connections are provided on the pcb to connect the print with a device. These connections are identical to those of the RIAA preamplifier K2573 and in case you use the connectors included in this kit, you may interchange the two prints. 1. 2. 3. 4. 5. Ground Out left Ground In left Ground (Power supply) 6. + (power supply) 7. In right 8. Ground 9. Out right 10.Ground The grounds near the Ins and Outs are used to connect the shielded wires (-) of the connecting leads.
PCB 8.
VELLEMAN NV Legen Heirweg 33, B-9890 GAVERE Belgium (Europe) Modifications and typographical errors reserved © Velleman nv. H2572IP’1 - 2014 (rev 3.
