Builder`s Guide for EFG issue 6
Contents
1. 192. header 8 way Molex MTA 0 1 housing 8 way 112APC Switchcraft 1 4 socket 112APC Switchcraft 1 4 socket T O on left hand Sock4 T O on left hand Sock 4 T O on right hand Sock4 T O on right hand Sock 4 SK1 SK2 SK3 SK4 on left hand Sock 4 SK1 SK2 SK3 SK4 on right hand Sock 4 A single wire link is to be fitted to L1 on both Sock4 PCBs L2 is left open on both Sock4 PCBs If using Molex KK you ll also need at least 32 crimp terminals Suitable lengths of wire to make up one single 100mm interconnect and one 140mm interconnect Three or four cable ties 180mm of thin screened audio cable See later for details All three LEDs can be wired in by using Molex KK 0 1 housings and solderless crimps The LED clips used here are the low profile types with white securing rings 11 Connections Power connections MOTM and Oakley The PSU power socket is 0 156 Molex MTA 4 way header Friction lock types are recommended This system is compatible with MOTM systems Power Pin number 15V 1 Module GND 2 Earth PAN 3 15V 4 Pin 1 on the I O header has been provided to allow the ground tags of the jack sockets to be connected to the powers supply ground without using the module s OV supply Earth loops cannot occur through patch leads this way although screening is maintained Of course this can only work if all your modules follow this principle Power connections Synthesizers com The PWR power socket
3. type since getting hold of a 1 metal film resistor in this value is not trivial nor worthwhile in this case 10R 22R 75R 100R 150R 510R 820R 1K 1K5 1K8 2K 3K 4K7 7K5 10K 12K 15K 18K 20K 22K 27K 30K 39K 47K 100K 220K 470K 1M 3M3 Capacitors 22pF COG 2 5mm ceramic 100pF COG 2 5mm ceramic 560pF COG 2 5mm ceramic 680pF COG 2 5mm ceramic 10nF polyester film box R25 R21 R37 R38 R33 R35 R59 R17 R29 R18 R7 R41 R54 R44 R57 R22 R31 R28 R4 R9 R10 R5 R23 R19 R8 R74 R73 R39 R1 R27 R20 R30 R3 R16 R6 R46 R26 R55 R40 R42 R53 R56 R45 R43 R58 R12 R61 R60 R72 R13 R63 R62 R36 R70 R47 R14 R71 R2 R64 R49 R48 R50 R11 R24 R32 R34 R15 C4 C14 C5 C38 C15 C40 C26 C41 C27 C30 C37 C31 C36 C8 100nF multilayer axial ceramic 680nF polyester film box luF polyester film box 2u2 63V electrolytic 22uF 35V electrolytic 47uF 35V electrolytic C32 C35 C33 C47 C9 C34 C46 C17 C28 C18 C19 C1 C24 C39 C29 C21 C22 C10 C11 C16 C6 C7 C3 C13 C25 C12 C20 C2 470pF may be used in place of 560pF Potentiometers Pots Pots Alpha 16mm PCB mounted types 47K or 50K linear 10K dual stereo linear Three 16mm pot brackets LEDs 5mm red round LED 5mm orange round LED 5mm green round LED FREQUENCY THRESHOLD RESPONSE GAIN PEAK ENV GATE Three LED clips for front panel and three LED securing rin
4. 8 signal diode D1 D2 D3 D4 D5 D6 D7 D8 D9 D12 D13 1N5819 Schottky power diode D18 D19 BAT42 small signal Schottky diode BCS550 NPN small signal transistor BCS560 PNP small signal transistor Integrated Circuits LF412 dual FET op amp OP275 dual audio op amp SSM2164 or V2164 quad VCA TLO74 quad FET op amp D10 D11 Q1 Q2 Q4 Q5 Q3 U7 U1 U2 U5 U3 U4 U6 DIL IC sockets are to be recommended You need three 8 pin three 14 pin and one 16 pin sockets For the pre amplifier any good dual op amp can be used Decent enough performance can be had even with a TL072 or LF412 Switches SPST or SPDT toggle switch Miscellaneous Leaded axial ferrite beads MTA156 4 way header MTA100 6 way header Molex MTA 0 1 header 6 way Molex MTA 0 1 housing 6 way Molex MTA 0 1 header 8 way Molex MTA 0 1 housing 8 way Wire Links X10 EXP L1 L2 L3 PSU Oakley MOTM power supply PWR Synthesizers com power supply rO 1 for connecting to sockets rO 1 for connecting to sockets I O 2 for connecting to sockets rO 2 for connecting to sockets These are made either from resistor lead clippings or thin solid core wire On LK2 use two links to connect pins 1 and 2 together and pins 3 and 4 together LK is left open and no links are fitted 10 Components required if using optional Sock4 boards Molex MTA 0 1 header 8 way Molex MTA 0 1 housing 8 way Molex MTA 0 1
5. Oakley Sound Systems SU Oakley Modular Series EFG amp EFG Deluxe Envelope Follower amp Gate Extractor PCB Issue 6 Builder s Guide V6 0 2 Tony Allgood B Eng PGCE Oakley Sound Systems CARLISLE United Kingdom Introduction This is the Project Builder s Guide for the issue 6 EFG and EFG Deluxe modules from Oakley Sound This document contains a full parts list for the components needed to populate the board and gives details on how to wire up the module in either of its guises For the User Manual which contains an overview of the operation of the unit please visit the main project webpage at http www oakleysound com follower htm For general information regarding where to get parts and suggested part numbers please see our useful Parts Guide at the project webpage or http www oakleysound com parts pdf For general information on how to build our modules including circuit board population mounting front panel components and making up board interconnects please see our generic Construction Guide at the project webpage or http www oakleysound com construct pdf The Issue 6 EFG PCB FE iz nm 88 SS gt 9 4 O sj o clo n o a tagina OLAGA a mead H S E2 UAP t2 O This is the prototype of the issue 6 standard EFG module behind a natural finish 1U wide Schaeffer panel Note the use of the optional Sock4 socket board to facilitate the wiring up of the six sockets
6. On the EFG printed circuit board I have provided space for the four main control pots If you use the specified 16mm Alpha pots and matching brackets the PCB can be held very firmly to the panel without any additional mounting procedures The pot spacing on this board is the standard Oakley spacing of 1 625 The design requires plus and minus 15V supplies The power supply should be adequately regulated The current consumption is around 48mA and 38mA for the EFG Deluxe and slightly less for the EFG Power is routed onto the main PCB by either a four way 0 156 MTA156 type connector or the special five way Synthesizers com MTA100 header You could of course wire up the board by soldering on wires directly The four pins are 15V ground earth panel ground 15V The earth panel connection allows you to connect the metal front panel to the power supply s ground without it sharing the modules ground line The main PCB has four mounting holes for M3 bolts one near each corner These are not required for panel mounting if you are using the three 16mm pot brackets The board size is 107mm deep x 143mm high The main board has been laid out to accept connection to our Sock4 socket board This small board speeds up the wiring of the sockets and reduces the chances of building mistakes Two such boards are required with the EFG Deluxe Issue 6 EFG and EFG Deluxe Parts Lists For general information regarding where to get parts and sug
7. W IN 16 Lug Type Earth lugs Signal Lug Signal lug NC lug Signal lug NC lug Signal lug Wiring the switches The standard EFG uses one panel mounted switch and the EFG Deluxe uses two Both are wired in the same way that is with a twisted wire pair This is simply made by twisting two pieces of insulated multistrand wire together to form a simple cable You can use two different colours but you don t have to Now it does not matter which of those two wires connects to which lug on the switch However to make the switches behaviour match the front panel s legending it is important to connect the wires to the right pair of lugs on the switch For the x10 switch you need to ensure the two wires connect to the top pair of lugs of the switch This means that when the toggle of the switch is down the contacts are closed and the pre amp is switched to its high gain mode The standard EFG s x10 switch Note that the twisted pair connects to the top pair of lugs on the switch With the EFG Deluxe you have an additional switch Just to make things slightly awkward you need to connect your switch so that the twisted wire pair connects to the bottom two lugs on the LIN EXP switch Thus the contacts should be closed when the toggle is in the up position In other words it behaves in opposite fashion to the x10 switch 17 Wiring the off board pots The standard EFG has all of its pots mounted on the board However the EFG Deluxe use
8. ay T O on Sock 4 112APC Switchcraft 1 4 socket SK1 SK2 SK3 SK4 on Sock 4 L1 and L2 are left open and no links are fitted to the Sock4 PCB If using Molex KK you ll also need at least 32 crimp terminals Suitable lengths of wire to make up one single 100mm interconnect 180mm of thin screened audio cable A single cable tie may be needed See later for details 2 EFG Deluxe Parts List Resistors 1 0 25W metal film types are to be recommended simply because they are better quality and lower noise components However 5 ones can be substituted in most of the places if you wish The 3M3 resistors will probably have to be a 5 type since getting hold of a 1 metal film resistor in this value is not trivial nor worthwhile in this case 10R R25 R21 22R R37 R38 R33 R35 75R R52 R59 R17 100R R29 150R R18 R7 510R R41 R54 R44 R57 820R R22 1K R31 R28 R4 1K5 R9 1K8 R10 2K R5 R23 3K R19 4K7 R67 R68 R8 7K5 R74 R73 10K R51 R39 R1 R27 12K R20 15K R30 18K R3 R16 20K R6 22K R65 R46 27K R26 30K R55 R40 R42 R53 R56 R45 R43 R58 39K R12 47K R61 R60 R72 100K R13 R63 R62 R36 R70 R69 R47 R14 R71 R2 R64 R49 R48 R50 220K R11 470K R24 R32 1M R34 3M3 R66 R15 Capacitors 22pF COG 2 5mm ceramic C4 C14 C42 100pF COG 2 5mm ceramic C5 C38 C15 560pF COG 2 5mm ceramic C40 C26 C41 C27 680pF COG 2 5mm ceramic C30 C37 C31 C36 10nF polyester film box C8 100nF m
9. ders that connect to the sockets I O_1 and IN The IN header is near the top of the board and carries the pre amp input signal VYO_1 Pad name Socket Lug Type Pin 1 PAN GND Connect to all sockets Earth lugs Pin 2 GATE GATE Signal lug Pin 3 No connection Pin 4 FLWOUT CV OUT Signal lug Pin 5 No Connection Pin 6 PRE OUT PRE OUT Signal lug IN Pad name Socket Lug Type Pin 1 GND PRE IN NC lug Pin 2 IN PRE IN Signal lug Use screened cable for connection from IN to PRE IN socket Screen should connect to pin 1 and NC lug of PRE IN socket 15 2 EFG Deluxe There are three headers that connect to the sockets I O_1 I O_2 and IN The IN header is near the top of the board and carries the pre amp input signal O1 Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 IN Pin 1 Pin 2 Pad name PAN GND GATE No connection FLWIN PRE OUT PRE OUT Pad name GND IN Socket Connect to upper sockets GATE FOLLOW IN FOLLOW IN PRE OUT Socket PRE IN PRE IN Lug Type Earth lugs Signal Lug Signal lug NC lug Signal lug Lug Type NC lug Signal lug Use screened cable for connection from IN to PRE IN socket Screen should connect to pin 1 and NC lug of PRE IN socket ro 2 Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pad name PAN GND LAG OUT No connection LAG IN ABS_ OUT FLW SLEW_OUT ABS _ OUT SLEW_IN Socket Connect to lower sockets LAG OUT LAG IN LAG IN SLEW OUT SLEW IN SLE
10. gested part numbers please see our useful Parts Guide at the project web page or http www oakleysound com parts pdf The module may be built as one of two variants There are significant differences between the two builds To make things easier I have provided two sets of parts lists one for the EFG and one for the EFG Deluxe Take careful note of the various links fitted to the board as not getting this right will lead to much confusion In the parts lists the components are grouped into types and then values The order of the component names R1 C1 etc is of no particular consequence A quick note on European part descriptions R is shorthand for ohm K is shorthand for kilo ohm R is shorthand for ohm So 22R is 22 ohm 1K5 is 1 500 ohms or 1 5 kilohms For capacitors luF one microfarad 1000nF one thousand nanofarad To prevent loss of the small as the decimal point a convention of inserting the unit in its place is used eg 4R7 is a 4 7 ohm 4K7 is a 4700 ohm resistor 6n8 is a 6 8 nF capacitor A close up of the lower part of the EFG standard version showing two of the three links You can see the links in pins 2 and 3 of LK2 and pins 7 and 8 of I O_2 1 EFG Parts List Resistors 1 0 25W metal film types are to be recommended simply because they are better quality and lower noise components However 5 ones can be substituted in most of the places if you wish The 3M3 resistors will probably have to be a 5
11. gs if required If using my suggested way of wiring up the LEDs you will also need three two way 0 1 Molex style housings and six crimps Discrete Semiconductors 1N4148 signal diode 1N5819 Schottky power diode BC550 NPN small signal transistor BCS560 PNP small signal transistor Integrated Circuits OP275 dual audio op amp SSM2164 or V2164 quad VCA TLO74 quad FET op amp D1 D2 D3 D4 DS D6 D7 D8 D9 D12 D13 D18 D19 Q1 Q2 Q4 Q5 Q3 U1 U2 U5 U3 U4 U6 DIL IC sockets are to be recommended You need two 8 pin three 14 pin and one 16 pin sockets For the pre amplifier any good dual op amp can be used Decent enough performance can be had even with a TLO72 or LF412 Switches SPST or SPDT toggle switch X10 Miscellaneous Leaded axial ferrite beads L1 L2 L3 MTA156 4 way header PSU Oakley MOTM power supply MTA100 6 way header PWR Synthesizers com power supply Molex MTA 0 1 header 6 way T O 1 for connecting to sockets Molex MTA 0 1 housing 6 way rO 1 for connecting to sockets Wire Links These are made either from resistor lead clippings or thin solid core wire 1 LK is linked LK is found between R24 and R33 2 On LK2 use a single link to connect pins 2 and 3 together Pins 1 and 4 have nothing inserted 3 On I O _2 pins 7 and 8 are linked Components required if using the optional Sock4 board Molex MTA 0 1 header 8 way T O on Sock4 Molex MTA 0 1 housing 8 w
12. is fitted when you are building the standard EFG module but L1 is fitted on both Sock4 boards when you are building the EFG Deluxe For the standard EFG and left hand Sock4 on the EFG Deluxe you now need to make up a special interconnect and it s a little different than the usual eight way Sock4 interconnection you may have done on other Oakley modules The Sock4 features an eight way header but not all eight connections are going back to the main board and not all of those are going to the same place on the main board Pin 8 is carrying the pre amp input and as such needs to travel within a screened cable The screen of that cable being connected to pin 7 of the Sock4 header The other six connections of the Sock4 s header can be connected to the I O_1 header on the main board but in truth only four for the EFG or five for the EFG Deluxe of these are actually used so we can save a bit of wire and only fit those 13 Let s put those connections into a simple table to make it a little clearer Sock4 header Pin 1 Pin 2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Main board destination 1 O_1 pin 1 1 O_1 pin2 No connection 1 O_1 pin4 1 O_1 pin 5 not needed on standard EFG 1 O_1 pin6 Screened cable screen connects to IN pin 1 Screened cable core connects to IN pin 2 Remember that pin is the square solder pad for any connector on an Oakley PCB The insulated wire needs to be around 100mm long and the screened cable around 180m
13. is to be fitted if you are using the module with a Synthesizers com system In this case you should not fit the PSU header The PWR header is a six way 0 1 MTA but with the pin that is in location 2 removed In this way location 3 is actually pin 2 on my schematic location 4 is actually pin 5 and so on Power Location number Schematic Pin number 15V Missing Pin 5V Module GND 15V Not connected 1 NnB WN nA BW NN 5V is not used on this module so location 3 pin 2 is not actually connected to anything on the PCB If fitting the PWR header you will also need to link out pins 2 and 3 of PSU This connects the panel ground with the module ground Simply solder a solid wire hoop made from a resistor lead clipping to join the middle two pads of PSU together 12 Building the EFG module using the Sock4 board This shows the Sock4 connection on a standard EFG Here I have used Molex KK 0 1 connectors These are solderless crimp fixings that make a low cost but effective connection Pin 7 and 8 of the interconnect are connected via a screen cable also crimped into the Sock4 s Molex housing and go on to the pre amp input IN on the main board Using the optional Sock4 boards is the simplest way of connecting all four or eight sockets to the main board The Sock4 board or boards should be populated in the way described in our general construction guide found on the project webpage Neither wire link on the Sock4
14. m long The top end of the screened cable The screen being connected to pin I and the core of the cable connected to pin 2 Here I have used a bit of black heatshrink to keep things neat and tidy For the EFG Deluxe you have two Sock4 boards For the right hand board you simply need to connect it to the main board s I O_2 header with the usual eight way interconnect Make this interconnect from standard insulated multistrand wire Its length should be around 140mm 14 Hand wiring the sockets If you have bought Switchcraft 112A sockets you will see that they have three connections One is the earth or ground tag One is the signal tag which will be connected to the tip of the jack plug when it is inserted The third tag is the normalised tag or NC normally closed tag The NC tag is internally connected to the signal tag when a jack is not connected This connection is automatically broken when you insert a jack Once fitted to the front panel the ground tags of each socket can be all connected together with solid wire I use 0 91mm diameter tinned copper wire for this job It is nice and stiff so retains its shape A single piece of insulated wire can then be used to connect those connected earth tags to pin 1 of I O_1 and or I O_2 Pin 1 is the square solder pad All the other connections are connected to the signal or NC lugs of the sockets The tables below show the connections you need to make 1 Standard EFG There are two hea
15. s two off board pots These need to be connected to the main board with flying wires much like the switches For my prototype I used twisted wire pairs again This keeps most of the unwanted stray noise from getting into the lag circuitry However the main board does allow the use of twin cored screened cable for additional noise immunity if you wish to use that Each pot is wired identically with just two wires needed to make the connection The pots are used as variable resistors so we don t need to use all three of the pot s solder lugs If you are using twisted wire pairs you need to connect each pot as follows Pin 1 the square pad Wiper of the pot Pin 3 the round pad CCW of the pot The wiper of the pot is the middle pin The CCW counter clockwise pin is the right hand pin when the pot has it s pins facing down and you are looking from the rear Remember the lag circuitry produces its fastest times when the pot resistance is at its minimum value If you wish to use screened cable you need to ensure that the cable you are using has two cores This is sometimes called twin screened cable Pin 2 of each of the pot s connecting pads is connected to ground or OV Thus for each length of screened cable you can connect the screen to pin 2 However you must remember not to connect the screen at the other end of the cable the pot end to anything Just snip it off and use a bit of heatshrink to prevent the frayed ends from shorting to an
16. ultilayer axial ceramic C32 C35 C33 C47 C9 C34 C46 680nF polyester film box C17 C28 luF polyester film box C18 C19 C1 C24 2u2 polyester film box C43 C45 2u2 63V electrolytic C39 C29 22uF 35V electrolytic C21 C22 C10 C11 C16 C6 C7 47uF 35V electrolytic C3 C13 C25 C12 C20 C2 470pF may be used in place of 560pF C23 and C44 are normally left empty when using 2 2uF capacitors in positions C43 and C45 However 2 2uF is quite a large value and you may not be able to obtain it from your supplier In this case simply use four luF polyester film caps in positions C23 C43 C44 C45 Should you wish to achieve longer lag times you may wish to populate all four positions with 2u2 polyester box capacitors This will double the rise and fall times of the lag generator in both the minimum and maximum positions of the up and down pots Potentiometers Pots Pots Alpha 16mm PCB mounted types 47K or 50K linear FREQUENCY THRESHOLD RESPONSE 10K dual stereo linear GAIN Pots Alpha 16mm PCB or chassis mounting types 1M log UP DOWN both mounted off board via flying wires Three 16mm pot brackets LEDs 5mm red round LED PEAK 5mm orange round LED ENV 5mm green round LED GATE Three LED clips for front panel and three LED securing rings if required If using my suggested way of wiring up the LEDs you will also need three two way 0 1 Molex style housings and six crimps Discrete Semiconductors 1N414
17. ything they shouldn t 18 Final Comments If you have any problems with the module an excellent source of support is the Oakley Sound Forum at Muffwiggler com Paul Darlow and I are on this group as well as many other users and builders of Oakley modules If you can t get your project to work then Oakley Sound Systems are able to offer a get you working service If you wish to take up this service please e mail me Tony Allgood at my contact e mail address found on the website I can service either fully populated PCBs or whole modules You will be charged for all postage costs any parts used and my time at 25GBP per hour Most faults can be found and fixed within one hour and I normally return modules within a week The minimum charge is 25GBP plus return postage costs If you have a comment about this builder s guide or have a found a mistake in it then please do let me know But please do not contact me or Paul Darlow directly with questions about sourcing components or general fault finding Honestly we would love to help but we do not have the time to help everyone individually by e mail Last but not least can I say a big thank you to all of you who helped and inspired me Thanks especially to all those nice people on the Synth diy and Analogue Heaven mailing lists and at Muffwiggler com Tony Allgood at Oakley Sound Cumbria UK June 2011 No part of this document may be copied by whatever means without my permission
Download Pdf Manuals
Related Search