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TubeOhm SMR4P, Diy Manual

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TubeOhm SMR4P Diy Manual Download Page 54

Test:  

1:)

does the Cutoff  pot work ?

2:)

does the Resonancy  pot  work ?

3:)

does  the Filtermode Pot work ? Can you select different filtertypes ??

OK , if all pots works  we test now the voltage control.

You  should have a control voltage 0..10 Volt. From Eurorack or a separate power supply .
Connect the voltage  to the 'RES' jack. If you now increase the Voltage  from 0..10 Volt the 
resonancy increases  from 0  to maximum .

Include the SMR4P-Multi  is also a VCA. Direct output (VCF) is only the VCF signal. The VCA 
output  'VCA' and it is controlled  with the GAIN input voltage.

Here the configuration VCA

The input voltage 'GAIN'  controls  the volume of the Filter output  (VCA). Test it with 0..10 Volt.

C-MOD is a second control voltage for the Cutoff frequency   -for an LFO for example.
Test it with  0..10 Volt

CUT  controls the cutoff in Volt pro Octave  1Volt = 1 Octave

54

Summary of Contents for SMR4P

Page 1: ...29 08 2018 TubeOhm SMR4P multi VCF DIY manual 2017 by TubeOhm 1...

Page 2: ...xt 0 10v V OCT modulation ext 0 10 v inbuild filter FM inbuild VCA ext control 0 10 v 15 filtermodes available 6 12 18 24dB LP 6 12 18 dB HP 6 12 dB BP HP2LP HP3LP Notch Phaser Notch LP1 Phaser LP1 Vo...

Page 3: ...1 Prepare the PCB Separate the PCB in three parts Simply break the PCB into 3 peaces and cut with a cutter the little rest on the top and back of the PCB break it into three peaces 3...

Page 4: ...cut the rest with a cutter smooth it with a file 4...

Page 5: ...Board V 1 03 for the CPU and the pole mixing 3 the Analog board V 1 03 the complete filter board Let us start with the analoge board V 1 03 first we solder all resistors and coils diode second all cap...

Page 6: ...e start with R 59 68ohm Image Description Quantity Notes 68 ohm 1 Blue gray black gold brown R59 than 5 x 220 ohm Image Description Quantity Notes 220 ohm 5 Red red black black brown R18 29 31 39 72 6...

Page 7: ...2x 1k ohm Image Description Quantity Notes 1k ohm 2 Brown black black brown brown R19 58 3x2 2k ohm Image Description Quantity Notes 2 2k ohm 3 Red red black brown brown R23 65 71 7...

Page 8: ...10k ohm Image Description Quantity Notes 10k ohm 12 Brown red black black brown R16 17 27 28 30 32 34 35 36 37 55 63 1x 12k ohm Image Description Quantity Notes 12k ohm 1 Brown red black red brown R...

Page 9: ...2x 15k ohm Image Description Quantity Notes 15k ohm 2 Brown green black red brown R 21 38 3x22k ohm Image Description Quantity Notes 22k ohm 3 Red red black red brown R 20 57 67 9...

Page 10: ...1x 33k ohm Image Description Quantity Notes 33k ohm 1 Orange orange black red brown R13 1x47k ohm Image Description Quantity Notes 47k ohm 1 Yellow purple black red brown R14 10...

Page 11: ...1x 86 6k ohm Image Description Quantity Notes 86 6k ohm 1 Gray blue blue red brown R70 1x 115 k ohm Image Description Quantity Notes 115k ohm 1 Brown brown green orange brown R24 11...

Page 12: ...1x 120 k ohm Image Description Quantity Notes 120k ohm 1 Brown red black orange brown R22 1x 180k ohm Image Description Quantity Notes 180k ohm 1 Brown gray black orange brown R66 12...

Page 13: ...1x 510 k ohm Image Description Quantity Notes 510k ohm 1 Green brown black orange brown R60 Now all resistors are in place 13...

Page 14: ...Coil 10 uH in this version or this version 2 Brown black black silver L2 L3 attention looks like a resistor but is a coil and 2x Diode 1N5819 Image Description Quantity Notes 1N5819 polarized 2 D17 D1...

Page 15: ...w we solder the capacitors 1x 10 pF Image Description Quantity Notes 10 pF ceramic 1 marked with 10pF C20 10 pF and 3x 100 pF Image Description Quantity Notes 100 pF ceramic 3 marked with 101 C27 29 3...

Page 16: ...ty Notes 3 3nF ceramic 2 marked with 332 C12 17 3 3nF And 1x 10 nF Image Description Quantity Notes 10 nF ceramic 1 marked with 103 C19 10 nF And 1x220nF Image Description Quantity Notes 220 nF cerami...

Page 17: ...uantity Notes 100 nF ceramic 13 marked with 104 C11 15 21 31 33 39 40 41 46 47 48 50 51 100nF 4x330pF Image Description Quantity Notes 330 pF for the filterpoles 4 marked with 330 C5 22 25 34 330p Cap...

Page 18: ...d 3 marked with 4 7uF polarised it is a specially small cap C13 30 32 4 7uF 2x100uF polarised Image Description Quantity Notes 100 uF elko polarized 2 marked with 100uF polarised it is a specially sma...

Page 19: ...to step three the transistors voltage regulators 78L08 Image Description Quantity Notes 8 Volt positiv regulator 1 IC 3 78L08 And 79L08 Image Description Quantity Notes 8 Volt negativ regulator 1 IC...

Page 20: ...ty Notes Transistor 2N3906 4 T1 2 3 4 2N3906 2x polyfuse Image Description Quantity Notes Fuse 200 MA 2 F1 2 FUSE alternative you can take a normal 3 3 ohm resistor Attention solder the fuses as flat...

Page 21: ...uantity Notes Poti 20 k ohm 1 R11 poti 20 k ohm adjustment filter linearity Step four now the IC sockets connectors 4x 16 pin 2x 14 pin 1x 8 pin Attention to the mark Later it is much easier to put th...

Page 22: ...make first one solder pin warm while press the IC socket to the PCB Than warm up the second solder pin while press the IC socket against the PCB Now the socket should lay flat on the PCB If all is OK...

Page 23: ...Now we must solder the male headers into the PCB We need K10 2x6 pin K3 2x10 pin K2 2x5 pin power connector attention this connector must be soldered from the backside 23...

Page 24: ...etter if all solderpoints in good contitions If you use Solder with PB you can use methylalcohol and a towel If you use solder leadfree simply clean the PCB with water depends of your solder flux Can...

Page 25: ...vinced you For me it is essential to clean my PCB s As you see you can control the solderpoints much better without solder fluxx than with Your Analog board is ready and we can test the voltage on the...

Page 26: ...sure also 12 3 volt Part tolerance measure of the part tolerance of the regulators it can be that the voltage can be a little higher or deeper Normally 8 Volt you measure 7 9 8 1 Volt this is ok Norma...

Page 27: ...l resistors and coils second all caps third the IC sockets and transistors power regulators forth the headers and pin connectors here is the control board without parts 1x 68 ohm Image Description Qua...

Page 28: ...4x 470 ohm Image Description Quantity Notes 470 ohm 4 Yellow purple black black brown R 5 6 7 8 Image Description Quantity Notes 4 7 k ohm 1 Yellow purple black brown brown R 62 28...

Page 29: ...2x10k ohm Image Description Quantity Notes 10k ohm 2 Brown red black black brown R1 41 1x 22k Image Description Quantity Notes 22k ohm 1 Red red black red brown R 12 29...

Page 30: ...1x 27k ohm Image Description Quantity Notes 27k ohm 1 Red purple black red brown R 64 1x 16 5k ohm Image Description Quantity Notes 16 5k ohm 1 Brown blue green red brown R 56 30...

Page 31: ...e Description Quantity Notes 24 9k ohm 1 5 ring red yellow white red brown 6 ring red yellow white red brown red R 73 3x 33 2k ohm Image Description Quantity Notes 33 2k ohm 3 Orange orange red red br...

Page 32: ...2x47k ohm Image Description Quantity Notes 47k ohm 2 Yellow purple black red brown R 44 68 6x49 9k ohm Image Description Quantity Notes 49 9k ohm 6 Yellow white white red brown R9 40 45 51 53 54 32...

Page 33: ...1x 68k ohm Image Description Quantity Notes 68k ohm 1 Blue gray black red brown R33 1x82k ohm Image Description Quantity Notes 82k ohm 1 gray red black red brown R10 33...

Page 34: ...black orange brown R3 4 15 25 26 42 43 46 47 50 69 Now we have all resistors in the control board one coil 10 uH Image Description Quantity Notes Coil 10 uH in this version or this version 1 Brown bl...

Page 35: ...second step 1x3 3nF Image Description Quantity Notes 3 3 nF ceramic 1 marked with 332 C7 3 3nF 1x100pF Image Description Quantity Notes 100 pF ceramic 1 marked with 101 C16 100pF 35...

Page 36: ...1x10pF Image Description Quantity Notes 10 pF ceramic 1 marked with 100 or 10p C23 10pF 12x100nF Image Description Quantity Notes 100 nF ceramic 12 marked with 104 C3 4 6 18 24 35 42 43 44 49 52 53 36...

Page 37: ...x4 7uF polarised Image Description Quantity Notes 4 7 uF elko 1 marked with 4 7uF polarised it is a specially small cap C36 third step 1x1N4148 Image Description Quantity Notes 1N4148 polarized 1 D1 3...

Page 38: ...tion Quantity Notes 5Volt regulator 1 IC 10 78L05 fourth step IC sockets and the pin connectors the sockets 3x8 1x16 1x28 Attention to the mark Later it is easier to push the IC s with the right direc...

Page 39: ...t with the finger against the PCB Do the same with pin 15 Now the IC socket should be flat on the PCB After this you can solder the rest Do the same procedure with all IC sockets Now we build in the t...

Page 40: ...etter taht all solderpoints are good If you use solder with PB you can clean the PCB with methylalcohol and a towel If you use solder leadfree simply clean the PCB with water depends of your solder fl...

Page 41: ...ectors on the backside K4 2x10 K8 2x6 Attention first solder 2 pins and press the Connector against the PCB while soldering Be sure that all the connectors are 100 correct and straight build in Congra...

Page 42: ...voltage on the control board Procedure Connect the analog board with the control board Than measure the following points with a Multimeter Voltages are 12volt 12volt 8volt 8 volt 5 volt and Ground al...

Page 43: ...e Alu pannel we must work with the Pannel PCB and the frontpannel On the right side you see a longhole So you have the posibillity to move the PCB a little to right or left on the frontpannel Now we s...

Page 44: ...2x 10 pin and K6 2x 8 pin Than put the Pannel board from the top to the connectors Be sure that the pins fit in the holes Solder at first one pin from K7 and K9 All straight and the connectors are fla...

Page 45: ...art of the mounting We need 4 pots 4x 10k ohm pots Image Description Quantity Notes 10k ohm pots 4 marked with CC103B CUT RESO FM F MOD And 8x Thonkiconn Image Description Quantity Notes 3 5 Eurorack...

Page 46: ...First we put the pots and only 2 Jacks in the positions without soldering Solder now only the two 3 5 Jacks Take the frontpannel and screw it from the backside to the pannel board 46...

Page 47: ...see that the pots not soldered yet Now put the knobs on the potis and center it so good as you can You must also screw the jacks with its nuts on the front panel All is in center and looks good OK th...

Page 48: ...in the holes of the frontpannel LED mounting The SMR4P multi used flat green LED s If you don t like the green ones coming with the kit you are free to use LEDS in another color The LED output 470 ohm...

Page 49: ...Now we take tape and glue it over the LED holes of the front panel In the next step you put all 15 LED s into the pannel pcb Long leg to left short leg to right Don t solder the LED s now 49...

Page 50: ...se the tape The LED s glue on the tape and we get a nice surface You can solder the LED s Are all LED s in the right direction Like ever first solder one leg all straight all in the same height And th...

Page 51: ...nalog board We need the following IC s 2x TL074 quad opamp 3x LM13700 1x TL072 dual opamp 1x CD4053 must be the CMOS type NOT a 74HC4053 The direction of the IC s is marked in RED Next step is the con...

Page 52: ...CB is 11 mm You need 2 spacer a 10 mm and two washer for each spacer Attention use the washer to prevent shorts near the holes on the PCB If you source yourselfe the Washer is for M3 screws and 0 5mm...

Page 53: ...inished Now you can connect the filter to 12 volt power Test at first the complete filter For this it is helpfull to have a scope If you don t have a scope connect a audio signal to AUDIO in Set with...

Page 54: ...ow increase the Voltage from 0 10 Volt the resonancy increases from 0 to maximum Include the SMR4P Multi is also a VCA Direct output VCF is only the VCF signal The VCA output VCA and it is controlled...

Page 55: ...quency counter to the VCF output usefull is our Filter Kalibrator4free 5 Use only the CUT input for the calibration voltage 6 calibration voltage is first 0 volt adjust the resonance frequency with th...

Page 56: ...ulti http www tubeohm com page9 html If you have questions or suggestions feel free to contact me on Kontakt TubeOhm com The SMR4P Multi is a combination of the SMR4 MK2 and also the Four Pole Mission...

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