are recapped tube radios safe?

[Donny]

I have just done my second recap and I plan on using this radio it's an Admial clock radio since it's a clock it will need to be plugged in 24/7. I heat shrinked almost every cap and the radio seems to work well altho it took awhile to "fire up". I do not have a tube tester so I do not know how good the tubes are. So am I safe? Can old radios be left plugged in,or are tube radios just pretty do dads for shelf clutter?