Henry Engineering founder Hank Landsberg wrote in after reading the Workbench column where we showed the Sparkos “discrete ICs.” A number of years ago, Hank built an audio console based on OpAmp Labs ...
[Eric] has an Atwater Kent 55C AM radio from the early 1900’s. He’s been trying to restore the radio to proper working condition. His most recent pain has been with the rectifier tube. The tube is ...
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