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VVCA Velocity Voltage Controlled Amplifier

DIY Manual

©2018 Majella Audio

8

330K Resistors (4x)

The last 4 resistors! These are gonna be the
330K (R9, R21, R30, R40). Figure 6 shows
where they need to be placed.

Figure 6:

330K resistor placement

(YELLOW)

All manuals and user guides at all-guides.com

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Содержание VVCA

Страница 1: ...VVCA DIY MANUAL Version 1 0 All manuals and user guides at all guides com a l l g u i d e s c o m...

Страница 2: ...contains the PCB Panel and all electrical components to finish the module You will need as a bear minimum basic soldering tools and a Digital multimeter to finish this module Required tools Soldering...

Страница 3: ...ual 2018 Majella Audio 3 22R Resistors 2x First we start with the 22R restistors There are two of them R49 R50 They are placed on the yellow markings in the figure 1 Figure 1 22R resistor placement YE...

Страница 4: ...are soldered we can go on with the 1K resistors There are 7 resistors with a 1K value R2 R12 R14 R16 R22 R25 R32 Their placement is shown in figure 2 They are marked yellow The blue resistors represe...

Страница 5: ...Audio 5 10K Resistors 16x The next resistors to solder are the 10K resistors There are 16 of them that need to be soldered R4 R5 R6 R7 R13 R15 R18 R19 R23 R24 R27 R28 R33 R34 R37 R38 Figure 3 10K resi...

Страница 6: ...K Resistors 8x Now we are going to do the 100K resistors There are 8 of them R3 R8 R17 R20 R26 R29 R36 R39 Figure 4 shows their position yellow on the PCB Lets go champ Figure 4 100K resistor placemen...

Страница 7: ...o 7 220K Resistors 4x You should now be getting tired of soldering resistors but we are almost there Just four of these 220K resistors R1 R10 R11 R31 They are yellow marked in figure 5 Figure 5 220K r...

Страница 8: ...DIY Manual 2018 Majella Audio 8 330K Resistors 4x The last 4 resistors These are gonna be the 330K R9 R21 R30 R40 Figure 6 shows where they need to be placed Figure 6 330K resistor placement YELLOW Al...

Страница 9: ...ajella Audio 9 IC sockets 16 pin 2x For the LM13700 s we need to solder 2 IC sockets There are 2 IC sockets with 16 pins on the PCB Check the notch for correct orientation Figure 7 16 pin IC socket pl...

Страница 10: ...IY Manual 2018 Majella Audio 10 IC sockets 14 pin 1x Now we need to solder the 14 pin IC socket for the TL074 opamp Check the notch for correct orientation Figure 8 14 pin IC socket placement YELLOW A...

Страница 11: ...fier DIY Manual 2018 Majella Audio 11 100nF capacitors 6x The are 6 capacitors on this board Their placement is marked yellow Figure 9 100nF capacitors placement YELLOW All manuals and user guides at...

Страница 12: ...transistors 2N3906 4x The are 4 yellow marked PNP transistors on the PCB We now need to solder these Do not solder these the other way around Check the belly for the orientation figure 10 Figure 10 2...

Страница 13: ...lla Audio 13 Power connector 1x To connect this module to your eurorack system we will need to solder a 16 pin IDC connector Notice the orientation of the connector figure 11 Figure 11 Power connector...

Страница 14: ...m minijack connectors 8x Solder the 8 minijack connectors on the PCB We use these so you can include the VVCA in your patch cable spaghetti The placement of the jacks is marked yellow in firure 12 Fig...

Страница 15: ...figure 12 for their placement Note their orientation They will explode if not correctly placed no joke The positive side can be recognized by the longer leg The negative side is marked by a yellow go...

Страница 16: ...Majella Audio 16 IC placement You can turn off your soldering iron You will only need to place the IC s in their sockets Note the orientation of the IC s PCB is done Figure 12 IC placement All manuals...

Страница 17: ...IY Manual 2018 Majella Audio 17 Final check panel First check if the IC s and the 22uF capacitors are orientated correctly Now place the panel on to the jack connectors and put on the Hex nuts DONE Al...

Страница 18: ...Ceramic Capacitor C1 C2 C3 C4 C5 C6 2 22R Resistor R49 R50 4 220k Resistor R1 R10 R11 R31 3 22uF electrolytic capacitors C7 C9 C10 4 2N3906 PNP transistor T1 T2 T3 T4 4 330k Resistor R9 R21 R30 R40 2...

Страница 19: ...ifier DIY Manual 2018 Majella Audio 19 Thanks for your patience and soldering skills Enjoy your VVCA VVCA DIY Manual version 1 0 08 2018 2018 https majella audio com support majella audio com All manu...

Страница 20: ...VVCA Velocity Voltage Controlled Amplifier DIY Manual 2018 Majella Audio 20 Designed and made in Holland All manuals and user guides at all guides com...

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