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CB radios don't have high voltage - except the output of the radio. The parts of the radio you will need to use the scope are low voltage - eg ~4-5v p-p. If connecting the scope to the radios output, you will need to build an RF sampler first. VERRRY easy to do. Don't worry; be happy. http://www.worldwidedx.com/home-brew-mods/32110-rf-sampler.html
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