If you have the Sams manual; then there should also be a page that shows where the TP is on the chassis. But Nomad already nailed it; if you can find it.
he must be using different alignment as i have sams and do not see tp16refresh my memory, for some reason I do not remember the step for a TP16. . all I remember is a TP10 for this radio as far as the highest TP number. even searched my files for the 142 and did not find where it shows to test at TP16.
I use the trc-450 to align my 142 radios.