Related Manuals for Velleman-Kit K8020
Summary of Contents for Velleman-Kit K8020
- Page 1 Total solder points: 500 Difficulty level: beginner 1o 2o 3o 4o 5þ advanced HIGH-END VALVE CONTROL AMPLIFIER K8020 8020 Valve Control Amplifier +6dB Tuner Monitor ILLUSTRATED ASSEMBLY MANUAL H8020IP-1...
- Page 2 VELLEMAN KIT NV Legen Heirweg 33 9890 Gavere Belgium http://www.velleman.be...
- 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.
- Page 4 Assembly hints ⇒ 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. 1.3 Soldering Hints : 1- Mount the component against the PCB sur- face and carefully solder the leads...
- Page 5 Color code table...
- Page 6 Construction CONSTRUCTION The unit consists out of two PCB’s, one is the main PCB, P8020B and the other is the left channel input section P8021L. First we will start with the small P8021L, then we assemble the P8021B. Tip: The pictures on the packaging can be used as a guideline.
- Page 7 Construction 3. Capacitors 6. RCA connectors. Mount them straight and against the PCB C... q C1: 220p (221) q C2: 220p (221) q C3: 220p (221) q SK1: MJ-523AG/B BLACK q C4: 220p (221) q SK2: MJ-523AG/B BLACK q C5: 220p (221) q SK3: MJ-523AG/B BLACK q C6: 220p (221) q SK4: MJ-523AG/B BLACK...
- Page 8 Construction P8020B Assembly...
- Page 9 Construction 1. Jump wires 3. Resistors (check the color code) R... q R01: 10K (1-0-3) q R02: 10K (1-0-3) q J1... J26 q R03: 10K (1-0-3) q R04: 1K (1-0-2) q R05: 10K (1-0-3) q R06: 10K (1-0-3) 2. Diodes (check the polarity) q R07: 1K (1-0-2) q R08: 10K (1-0-3) q R09: 680R (6-8-1)
- Page 10 Construction q R37: 4K7 (4-7-2) 5. IC sockets q R38: 10K (1-0-3) q R39: 4K7 (4-7-2) q R40: 10K (1-0-3) q R41: 1K (1-0-2) q R42: 10K (1-0-3) q R43: 10K (1-0-3) q R44: 10K (1-0-3) q R45: 1K (1-0-2) q R46: 1K (1-0-2) q IC1: 18P q R47: 10K (1-0-3)
- Page 11 7. Female header 10. Reed relays (check the position of the notch) SK.. J... RY... q SK7: 20P (type 96120205) Construction q RY1: VR05051AS or eq. 8. transistors q RY2: VR05051AS or eq q RY3: VR05051AS or eq q RY4: VR05051AS or eq q RY5: VR05051AS or eq q RY6: VR05051AS or eq.
- Page 12 Construction 12. Valve socket mounting V... q V1: B9A q V2: B9A The valve socket is mounted on top of the allready mounted PCB pins. • First position the socket over the pins and solder one lead. • Check the hight of opprox. 23mm (0.9”) 13.
- Page 13 Construction 15. Voltage regulator. 17. Transformer. The back side corresponds to the thick line. VR... TRAFO... q VR2: UA7805 VR1 will be mounted later q TR1: TR8020, 2x18V, 12V, 220V/ 16. Electrolytic capacitors. 16VA Check the polarity ! First fix the transformer using four 6mm M3 screws and nuts (nuts at solder side), then solder his connec- C...
- Page 14 Construction 18. Volume potentiometer. 19. Mains voltage selection Use a piece of isolated brown wire to select the mains (outlet) voltage, as RV... indicated on the PC board. q For 115Vac (100 to 120Vac) A jumper between A-B, and a jumper q RV1: STRK27103 (2x50K ALPS) between C-D.
- Page 15 Construction 21. Mounting the LED’s. Check the polarity ! Short lead = Cathode or - CAUTION: After bending the leads the long LD... appearing lead will be the cath- ode! CATHODE First: Bend the leads exactly like IMPORTANT the drawing. Mount these LED’s exactly like in the drawing, otherwise some LED’s will not Next: Solder one lead, and check...
- Page 16 Construction 22. Mounting the sub PCB support q Mount four 2cm (0.8”) M3 spacers at the indi- cated positions using four 6mm (0.23”) M3 screws.
- Page 17 Enclosure preparation 23. Enclosure preparation q Cut the thread in the holes for the en- closure feet in one of the aluminum profiles, using the supplied special M4 screw as a tap. FIG. 1 q Cut the thread in the front and back of the aluminum profiles, using the supplied special M4 screw (4 holes per piece)
- Page 18 Enclosure preparation q Position the main PCB in the aluminum profile that is pre- pared with the feet. FIG. 5 Align pcb with profile ! q Mark the center position of the three fixation holes on the aluminum.
- Page 19 Enclosure preparation q Remove the pcb and use a knife or a screwdriver to scratch the paint from the alu- minum fixation, from the hole closest to the back end. This fixation will be used later to connect the ground and earth.
- Page 20 Final assembly 24. Potentiometer assembly and final PCB mount q Mount the PCB into the enclosure like before. Tip: Check if the pcb does not have to much play at the potentiometer posi- Play? tion. If there is too much play, put a piece of tape round the edge of the pcb to remove the slack.
- Page 21 Final assembly q Now carefully mount the front panel, us- ing two M4 Allen screws. Check the posi- tion of the LED’s. q Check if the potentiometer turns smoothly without touching the front panel, other- wise correct his position or the position of the front panel.
- Page 22 Final assembly 25. Final assembly and connection Mounting the voltage regulator: q VR1: 7812 (isolated plastic type) First bend his leads like in the drawing Then mount him onto the previously in- serted hexagonal screw, at the appropri- ate position according to the PCB. Use a 5mm spacer screw.
- Page 23 Test q Connect the mains wires to the mains connector, Blue= Neutral, Brown= Live, and green/yellow= Earth. Use a piece of 1.5cm (0.6”) shrink tube to isolate each connec- tion. FIG. 4 q Mount the front panel onto the front, using two M4 Allen screws.
- Page 24 Diagram 26. IC and Valve mounting Insert the IC into his socket. Watch the position of the notch! q IC1 VK8020 / PIC16C54RC Insert the valves into their socket (watch the position) q V1: ECC82, 12AU7, CV491, 6189, 8136 q V2: ECC82, 12AU7, CV491, 6189, 8136 27.
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Page 25: Power Supply Section
Diagram 230V 115V 1N4007 uA7812P 21V@230Vac in +12.5V 1N4007 Mains selection SK10 100n 100n 470µ 100n 1N4148 100n +12V 22n/630V 220V SK09 1N4007 1N4007 265V@230Vac in +300V SK08 100n 47µ/350V 47µ/350V 47µ/350V 1N4007 1N4007 MAINS 27K/0.6W 27K/0.6W 27K/0.6W D19 1N4007 L-424YDT 1N4007 uA7805... - Page 26 Diagram PU/LINE BC557 220p 1N4148 BC557 220p 1N4148 TUNER BC557 220p 1N4148 BC557 220p 1N4148 MONITOR BC557 220p 1N4148 LINE OUT L 330R 220p BC557 1N4148 LEFT INPUT / OUTPUT SECTION © Velleman Kit...
- Page 27 Diagram +300V PU/LINE SK01 170v BC557 100K 47µ/350V 220p 47µ/350V 1N4148 220V Input1 130V - 100V ECC82 68n/630V SK02 2.2uF RV1A BC557 220p 7V -4V 115V 680R 1N4148 3K6 1% +12.5V Input2 SK07 BC557 TUNER 4u7/160V SK03 BC557 3K6 1% 220p Line out L 1N4148...
- Page 28 VELLEMAN KIT NV Legen Heirweg 33 9890 Gavere Belgium Europe Info ?: http://www.velleman.be Questions ?: support@velleman.be Modifications and typographical errors reserved © Velleman Kit nv H8020IP - 2000 - ED1...