DUT 1
Yes, thats the name of the thread that catched my interrest. The author Quasi have a lot of nice designs on his homepage and he try to answer all questions on the above thread.
I salvaged a handfull of IRFP260's from the scrapheap at my work. They had been in an inverter PSU. I searched on MOSFETS and found Quasis schematic with PCB layout and all :-)
We had some indepth collaboration regarding idle current and crossover distortion. Read all about it from the same thread above but in the reply #2696 The discussion about R21's purpose becomes a very interresting sollution with a LED to come by unsymmetrical clipping and some of the crossover distortion.
I blowed one of the outputstages in my struggling
for the right idle current. I have not yet finished it and therefore
not even done any listening tests. In the meantime I have built
a protection circuit from Sam Electronic Circuits
I would not dare to connect my speakers to this amp yet. Testing
of that circuit isn't read yet. I had some help from another member
who allready had done PCB cards. I bought two and got some tip
from him because the original protection circuit from Sams site
didn't work that well from start.
Are you into building the same circuit, drop me a note and I can
give you more information.
In the meantime, until I get this amplifier protected I have som pictures in no particular order from the building process.
DIY Audio Startpage