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A whistle is Useless for testing since Nobody I have ever spoken with whistles to communicate.Even if the power was 10 times as much on a whistle it's useless for actual communications.A Voice Peak is a Far Better choice for ny modulated signal since it's what is used for communicating.I hear people whistle to tune an amplifier & they get upset when the amp will not put out the same output when they talk.It's quiet Funny to me. :rolleyes::LOL::p


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