Bill and Will's Synth
Scott Bernardi's Transistor Tester
Construction

May 2009 -

To build the YUSynth EMS Diode Ladder Filter, we want to use matched transistors. We asked Yves about how to go about the matching, and he referred us to the Scott Bernardi tester.

By comparing his schematic diagram and the PCB design he provides, we developed a layout for it on a MUUB3.

Background - Scott Bernardi's Design

Here's Scott's Schematic Diagram Schematic Diagram - click on the image for a larger version.

Here's the layout of his PCB:

We laid it out on a MUUB3, but something is wrong with it...

WE'LL RE-DESIGN AND RE-POST SOON.

Parts

Will and I have developed a parts-list / bill-of-materials in the form of an XL spreadsheet (as usual).  After some scrounging, we found everything OK. 

Please don't take it as gospel.  Even so, just now we've used it to make our Mouser and Digikey purchases and we are relatively confident in our specifications.

Click here to download our XL spreadsheet Parts List

Construction Phase 1

All the stuff in Phase 1 gets soldered using "Organic" Solder.  At every break in the action, we wash the board off to get rid of the flux.

Construction Phase 2

All the stuff in Phase 2 gets soldered using "No-Clean" Solder and the PCB doesn't get washed off from here on.

Set up / Testing

Use Notes