MATH’S NOTES

y trusty RadioShack portable audio amplifier finally died due to prolonged exposure to water after being accidentally left outside in the rain for a long period of time … everything inside was corroded beyond repair (it was obviously not waterproof). At that point, I decided it was time to obtain another one. This simple device was of great use throughout the years for countless applications, ranging from amplifying the output of crystal sets to audio signal troubleshooting, microphone testing and even once as a temporary amplifier for an electric guitar for my son. Since the