Dannysound EN129 Thru Zero Oscillator, Build Manual

Page 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...

Page 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...

Page 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...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Page 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...

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

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

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

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

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

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

Page 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...

Page 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...

Page 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...

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

Page 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...

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

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

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

Page 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...

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

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

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

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

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

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

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

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

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

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

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

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

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

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

Page 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...

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

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

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

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

Page 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...

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

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

Page 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...

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

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

Page 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...

Page 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...

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

Page 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...