PCB and Schematic:Whichever revision you have, use the components as labelled on the PCB (except the 48K/50K resistors as shown above).
|2||Potentiometer||A1M||9MM SNAP-IN||9mm vertical snap-in pot, Alpha / Panasonic style with 6mm built-in knob. Audio taper.||http://www.taydaelectronics.com/potentiometer-variable-resistors/rotary-potentiometer/logarithmic/1m-ohm-logarithmic-taper-potentiometer-round-knurled-plastic-shaft-pcb-9mm.html|
|1||Zener Diode||5Z1||SOD123||Footprint on PCB too big, need to use more solder|
|2||3.5mm socket||THONKICONN||3.5mm socket for Eurorack modular synths||http://shop.erthenvar.com/collections/accessories/products/3-5mm-inline-jacks||https://www.thonk.co.uk/shop/3-5mm-jacks/|
|1||Tile Tail||"Futaba J" Tile Tail.||http://pulplogic.com/product/tile-tail/|
|1||Opamp||TL072||SO08||Almost any dual Opamp can be used|
- Clean the PCB with Isopropyl Alcohol.
- Solder the surface-mount components to the PCB.
- Begin with resistors and capacitors.
- Note the 47K resistor changes in the PCB diagram above if using that PCB version.
- The small unlabelled footprints (0603 size) are 100n capacitors.
- The two large unlabelled footprints near the power header are M7/1n4007 diodes. A 1n4148 and 5.1V Zener are beneath the opamp. Make sure the polarity is correct.
- Finally, add the opamp, making sure it’s in the correct position (pin 1 is by the large white dot).
- If using hot-air or an oven to solder the surface-mount components then do this now.
- Inspect all of the soldered components for solder bridges between pins and components, especially around the opamp.
- Solder the Tile-Tail power lead. Trim the exposed front-side ends if they interfere with the pot.
- Solder the front components (pot and jacks). It’s a good idea to put the panel on before soldering to make sure they are aligned. Some pots have a metal support underneath — check that it doesn’t short the power lead pins. Cut the leads flush to the PCB if they are.
- Again inspect all of the soldered components for solder bridges between pins.