The sonar has two mods:
Switch #1 Up position gives me 200 percent Modulation clean and loud audio
Switch #1 DWN position gives me 100 percent normal modulation
Switch # 1 Up position gives me 3w deadkey and 12w Swing
Switch #2 Down postion gives me 3w deadkey and 12wSwing
Radio and Amp were both refurbished at CBSUPERTECH shop in Palmdale CA,

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