This is the second post along the road to DIY compressor bliss….
Picking up where I left off last time, I am starting by creating my own, super cheap, DIY version of the API 2520 Operational Amplifier. It will be used for the input and output stages of my take on an API 225L/2500 Frankenstein compressor. Initially I also planned on cloning the API 2510 used on original API compressor input stages, but my simulations have led me to believe that I will get better and more reliable performance from the same configuration, but using an API 2520 instead. All the basic resistors, capacitors and transistors arrived from element14 this week, whilst I was away for Christmas. They are ready to be soldered:
After inserting some bits on the PCB I made in my last post, here are the results of the layout – everything fits perfectly – all of the pre-planning paid off ( it’s just missing 2 capacitors, which had not arrived when these photos were taken ):
This view from the top really shows how nicely the placement is working:
Tonight I’ll be soldering the parts to the board to see how it all goes ( I’ve never worked with a DIY CNC’ed PCB before ), and if I get time, I might even run a quick test on it. More to come soon….