This simple modification on your Baofeng T1 or BF-9100A will increase your range from view hundred meters at best to a view kilometers! In my field test I got 5 kilometer from T1 to T1 whit out any distortion. This mod you can do whit in 30 minutes per radio.br Cut the inner coax to a length between 15.6 and 16 centimeters for PMR 446. (For GMRS 0ft. 6 - 132in. or 15.3 centimeter ) and for FRS 0ft. 6 - 332in. or 15.4 centimeter.