After retiring from the computer maintenance field, I am going to start repairing some old Tube radios my father in law left unfinished when he past away. From way back when school I got my electronics degree from; it was stated that good in circuit diagnostics was just as good as using a tube tester (if you were good at repair).
Is this s true-ism or does one need a tester? Most of radios are 30,40's. A few AK's, but testers didn't go back that far to some of their tubes. Thanks for your time and efforts.