to start with it is called a demoulator
channel 3/4 in to a/v out
btw why do u just not fixed the coax end ?
i mean pulld back,lift tuner cover,solder in new 30 cent piece
done,test,works,done,place back on,done
just make sure the set IS NOT PLUGED IN AT THE TIME
when u are ready to test >rf in is in place<,then plug set in BUT NOT BEFORE
ed