Here is the schematic for an 8 watt audio power amplifier. This amp can be used as a simple booster, the heart of a more complicated amplifier or used as a guitar amp. It is very small and portable ...
You could buy a cheap amp for $140, like I did. I got a Pioneer VSX D209 for that, with sales tax 6.5%. Sounds decent too.
Although the ubiquitous LM386 IC was designed to be used as an audio amplifier, it has a number of undocumented characteristics that can be exploited to create simple radio receiver circuits that ...
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