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Dannysound

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EN129 Thru Zero Oscillator

Build Guide v1.05

Contents

Section 1 - Main PCB

Resistors

Diodes

Inductors

IC Sockets

Capacitors

Transistors

Power Socket

Trim Pots

Electrolytic Capacitors

Board Connector

Section 2

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Power Test, Matched Transistors and IC placement

Section 3

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Pots PCB

Resistors

IC Sockets

Capacitors

Transistors

Panel Components

Calibration

Содержание EN129 Thru Zero Oscillator

Страница 1: ...n PCB Resistors Diodes Inductors IC Sockets Capacitors Transistors Power Socket Trim Pots Electrolytic Capacitors Board Connector Section 2 Power Test Matched Transistors and IC placement Section 3 Po...

Страница 2: ...e design is based upon here This build guide is for all kits and panel pcb sets purchased BEFORE September 2020 The PCB bag label should be white and on the front PCB it should be written V1 0 as circ...

Страница 3: ...3 1 Before starting on the main PCB first locate the single 220R resistor and solder it into R214 on the front PCB This designator is marked 1K but 220R is correct...

Страница 4: ...4 Section 1 Main PCB Resistors 1 15 x 100k resistors...

Страница 5: ...5 2 7 x 10k resistors...

Страница 6: ...6 3 6 x 1k resistors...

Страница 7: ...7 4 3 x 220k resistors...

Страница 8: ...8 5 3 x 2M2 resistors...

Страница 9: ...9 6 2 x 1k5 resistors...

Страница 10: ...10 7 2 x 1k8 resistors...

Страница 11: ...11 8 2 x 6k8 resistors...

Страница 12: ...12 9 2 x 470k resistors...

Страница 13: ...13 10 1 x 390r resistors...

Страница 14: ...14 11 1 x 2k2 resistors...

Страница 15: ...15 12 1 x 33k resistors...

Страница 16: ...16 13 1 x 150k resistors...

Страница 17: ...17 14 1 x 200k resistors...

Страница 18: ...18 15 1 x 56k resistors...

Страница 19: ...19 16 1 x 1M resistors...

Страница 20: ...20 17 1 x 8M2 resistors...

Страница 21: ...21 Diodes 18 3 x 1N4148 diodes Note orientation of this part is vital be sure to match the line on the component with that on the PCB silkscreen...

Страница 22: ...22 Inductors 19 2 x bead inductors...

Страница 23: ...23 IC Sockets 20 IC sockets Make sure the notches in the sockets match the notches on the silkscreen...

Страница 24: ...24 Capacitors 21 1 x 47pF capacitor located in diode bag...

Страница 25: ...25 22 12 x 100nF capacitors...

Страница 26: ...26 23 1 x 1nF polystyrene capacitor...

Страница 27: ...27 24 2 x 100pF capacitors...

Страница 28: ...s vital Ensure the flat face on the component matches the flat face on the PCB silkscreen Be careful to individually identify all the transistors there are many different types to separate make sure w...

Страница 29: ...29 Power Socket 26 1 x power socket make sure the slot is facing away from the edge of the PCB as indicated above Orientation is vital...

Страница 30: ...ction where the oscillator pitch tracks fine up to a certain point then starts to get flatter in the higher frequencies This has not been required in any of the modules tested so far and is not includ...

Страница 31: ...31 28 1 x 100r blue trimpot V OCT...

Страница 32: ...itors 29 2 x 10uF capacitor orientation is vital the longer lead on the component should go to the circular pad marked with a plus on the PCB Note the component has a grey stripe on the cylindrical bo...

Страница 33: ...33 Board Connector 30 Female connector...

Страница 34: ...34 Section 2 Power Test Matched Transistors and IC placement 1 test power Ground pin 6 IC18 12v pin 8 IC18 12v pin 4 IC18...

Страница 35: ...of 2N3906s both transistors have their flat edge facing towards C29 Orientation is vital The matched pair is located in the Panel PCB bag Take note of transistor orientation Place transistors as close...

Страница 36: ...36 3 1 x 2k TEMPCO resistor solder the tempco so that it s touching the matched pair below it...

Страница 37: ...37 4 5 x TL072 opamps orientation is vital for these opamps match the dot with the notch on the PCB silkscreen and IC Socket...

Страница 38: ...38 5 1 x TL074 opamp match the notch on the chip with the notch on the PCB silkscreen and IC Socket orientation is vital...

Страница 39: ...39 6 1 x CA3140 opamp match the notch on the chip with the notch on the PCB silkscreen and IC Socket orientation is vital...

Страница 40: ...40 7 2 x CA3080 opamps match the notch on the chip with the notch on the PCB silkscreen and IC Socket orientation is vital...

Страница 41: ...41 8 1 x CD4013 match the notch on the chip with the notch on the PCB silkscreen and IC Socket orientation is vital...

Страница 42: ...42 8 1 x CD4070 match the notch on the chip with the notch on the PCB silkscreen and IC Socket orientation is vital...

Страница 43: ...43 Section 3 Pots PCB Resistors 1 x 39K resistor...

Страница 44: ...44 1 4 x 120k resistors...

Страница 45: ...45 2 3 x 1k resistors R214 will already be filled with the 220R resistor that was soldered at the start of the build...

Страница 46: ...46 3 2 x 100k resistors...

Страница 47: ...47 4 2 x 10k resistors...

Страница 48: ...48 5 1 x 2k2 resistor...

Страница 49: ...49 6 1 x 3k3 resistor...

Страница 50: ...50 7 1 x 22k resistor...

Страница 51: ...51 8 1 x 30k resistor...

Страница 52: ...52 9 1 x 150k resistor...

Страница 53: ...53 10 1 x 1M5 resistor...

Страница 54: ...54 11 1 x 5M6 resistor...

Страница 55: ...55 IC Sockets 12 IC socket Make sure the notch in the socket matches the notch on the silkscreen...

Страница 56: ...56 Capacitors 13 2 x 100nF capacitors...

Страница 57: ...10uF capacitors orientation is vital the longer lead on the component should go to the circular pad marked with a plus on the PCB Note the component has a grey stripe on the cylindrical body on the m...

Страница 58: ...58 15 1 x 1uF NP capacitor This electro capacitor is non polar so orientation does not matter...

Страница 59: ...lat face on the component matches the flat face on the PCB silkscreen Orientation is vital Be careful to individually identify all the transistors there are many different types to separate make sure...

Страница 60: ...60 17 1 x 78L09 transistor Ensure the flat face on the component matches the flat face on the PCB silkscreen Orientation is vital...

Страница 61: ...61 18 1 x 79L09 transistor Ensure the flat face on the component matches the flat face on the PCB silkscreen Orientation is vital...

Страница 62: ...62 19 1 x SIL pin male header now is also a good time to screw the four hex standoffs onto the front PCB...

Страница 63: ...63 20 1 x TL072 opamp orientation is vital match the dot with the notch on the PCB silkscreen and IC Socket...

Страница 64: ...serted but NOT SOLDERED until the panel has been placed on top This is to ensure that the PCB fits the panel properly 21 3 x LEDs orientation is vital the shorter leg of the LED should go to the squar...

Страница 65: ...65 22 1 x Illuminated push button switch orientation is vital The red dot on the black body of the pushbutton switch goes on this side...

Страница 66: ...66 23 3 x B100k blue body plastic shaft pots...

Страница 67: ...67 24 2 x B100K green body metal shaft pots B100K...

Страница 68: ...2 x 10k linear alpha pots B10K B10K Note If you have one longer shaft B10K pot this must go in the Tune position if both shafts are the same length then they can both go in either position Tune Fine...

Страница 69: ...69 26 9 x jack sockets...

Страница 70: ...70 27 Insert 1 x pot nut this nut will sit below the panel...

Страница 71: ...71 28 Insert LED light pipes and retainer clips...

Страница 72: ...72 29 Fit the panel and insert second pot nut but do not fully tighten...

Страница 73: ...hten the nut Now replace the knob again screwing on with the supplied larger hex key Note be sure that the knob isn t scraping against the panel Inserting a piece of folded paper or thin card between...

Страница 74: ...74 31 Solder one pin on each of the four outer jack sockets then add nuts to keep panel in place...

Страница 75: ...75 33 Add knobs and solder one ground tab of each pot...

Страница 76: ...76 34 Solder the LEDs in place making sure the LEDs are lined up and touching the light pipes Check panel components are lined up properly and then solder the rest of the component pins on the PCB...

Страница 77: ...77 35 Add PCB mounting hardware connect the main board and insert the remaining screws...

Страница 78: ...78 Calibration This procedure requires an oscilloscope SINE SYM SAW TRIM SINE TRIM V OCT...

Страница 79: ...all other controls to 0 Connect the SINE output to the oscilloscope Ensure the scope trace is centered 1 If the wave looks more square than triangle then adjust SINE TRIM to obtain more of a triangle...

Страница 80: ...just SINE TRIM again to produce a sine wave shape If possible it s a good idea to listen to the oscillator when making this adjustment as you might prefer a more rounded sine wave 1 Pure sine wave 2 R...

Страница 81: ...81 3 Saw Trim Connect the oscilloscope to the SAW output Adjust SAW TRIM to obtain a saw wave...

Страница 82: ...he oscillator pitch tracks fine up to a certain point then starts to get flatter in the higher frequencies In practice I ve never had to use this as the oscillator tracks fine However if you do experi...

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