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Now we come to the last step - the Filter calibration in V/Octave

Information.
You need a frequency counter and a multimeter. Guitar tuner is also OK.

Procedure

1:)

You need

signal input

2:)

set Resonancy to

MAX, Filter FM to left=0

3:)

set the filtermode to 24 dB – first line, fourth LED

4:)

connect a frequency 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 the Cutoff pot to 100
Hz.

7:)

now set the calibration voltage to 1 volt, the frequency must be double to 200 Hz
if not , adjust it with R11 to 200 Hz .

8:)

set now the voltage to 2 Volt , does the frequency counter shows 400 Hz ??

9:)

set the voltage to 3 Volt – now it must be 800 Hz .

Plus/minus a few HZ is OK.

Содержание SMR4P

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

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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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