Sorry this took a couple of days. Is it better now?
Low frequency square performance is still adequate and high frequency square waves are completely stable even with C15 removed.
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I would tap R24 into the right hand side of R15. If needed you can add a 100r onto the base of Q2.
That's your theoretical starting point for the build.
Now, go back and review the other advice given before I joined in.
Expect to make a number of small and maybe one or two big changes to component values once you start seeing the testing results.
That's your theoretical starting point for the build.
Now, go back and review the other advice given before I joined in.
Expect to make a number of small and maybe one or two big changes to component values once you start seeing the testing results.
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Will do. Any tips as to what tests I should perform in order to see the results would be greatly appreciated.
So far I've been checking phase, freq response, DC offset, square wave, and FFT (although the noise floor of the oscilliscope is too high for the FFT to be of any real use).
Here you go: http://www.linearaudio.nl/linearaudio.nl/Miscellaneous/cherry ndfl amp.pdf
Start with sinewave and check the output shape compared to the input shape as you change both the amplitude and frequency. This is the easiet.
Then try triangle wave or sawtooth.
Finally squarewave.
Doing the squarwave last, allows you to know how not to overload the input.
Check that your sim correctly predicted the effect, or non effect, of adding a reactive load (the cable model).
Then try triangle wave or sawtooth.
Finally squarewave.
Doing the squarwave last, allows you to know how not to overload the input.
Check that your sim correctly predicted the effect, or non effect, of adding a reactive load (the cable model).
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