I operate an Icom handheld on aircraft power w/ external antenna on belly, along with a Garmin handheld on aircraft power w/ external antenna on top of glareshield. The two units are about 15 inches apart, but their antenna and power cables pass near one another. Never had any interference problems. Our previous aircraft had same setup with no problems. Maybe antenna placement thing, or electronic problem with Icom??
Joe, Wisconsin
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