I recently tried to hook up an old linear to my cobra cb, I found that although the linear worked it gave an unclear transmission. My antenna was tuned before the installation of the linear channel 1=2 channel19= 1.5 channel equaled 2.2 I ran the linear for a few transmissions then I removed it and tried to re tune the antenna. Now the readings I have are channel1=2 channel 19= 1 the needle barely moves and channel 40= 2. The low reading on channel 19 concerns me should it?