Important to test tubes after recapping a non-working TV or radio?

[Eric H]

Not much risk of damage but it's nice to know if your tubes are in top condition or not.
They can often have shorts or be weak and still basically function.

I just finished recapping an Admiral but the vertical wouldn't lock, turned out to be a weak Sync tube, it also had four bad 6AU6 tubes in the i.f. section, performance was greatly improved after replacing them.