i have that receiver. the amp connected to the whip is hot as a
firecracker and it overloads very easily. (the external ant jack isnt
much different!) use the antenna jack instead of the whip for a
connection. even then it wont handle that much wire. try laying your
wire right on the ground. i use a "snake" antenna with several sangean
radios with excellent results. even the low gain properties of an on
ground antenna is too much for this radio if its too long.