Dana Puopolo’s Guest Commentary, “Let’s Keep AM Sounding Good” (Jan. 19) contains a number of technical errors. Mr. Puopolo’s thesis hinges on the ideas that the thing which causes 5 kHz low-pass ...
A young chief engineer who knew a lot more about computers than transmitters and analog audio systems recently asked me for help in tracking down on-air distortion that had affected his mom-and-pop ...
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