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Hardware
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Universal Radio Tester
This simple device is a basic signal generator that can be used to debug audio and AM radio frequency circuits. It produces a (roughly) 1 kHz periodic wave output that has enough harmonic frequency content to go into high MHz range – this will make the signal audible even when…
Audio
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Bad Screamer: adding a mid-boost
All articles from the Bad Screamer series Thinking about this a little bit, there’s a way to act on the frequency response using a little more complex emitter negative feedback circuit. Did a bit of play with the sim and various values, I can create a mid bump this way…