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.

Don