Counterpoise Antenna add to Hand-held Radio
Add a Dog Tail, Tiger Tail, Rat Tail
You would construct a counterpoise antenna wire
11.5 inch for VHF.
6.5 inch for UHF.
About 19.5 inches for an OK performing dual band VHF/UHF radio.
Video Link
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HT Antenna Modification For Increased Performance! Link