Power blackouts - problem for tube amp & speakers


We have a lot of power blackouts in our area. The power goes and it takes 30 seconds for the generator to take over. Could it damage a tube amp + speakers (plop?) when power goes and comes again ? I am considering an tube amp ( coincident dynamo 34SE ) to replace a battery powered RWA amp. I have to relocate every 4 years in third world countries and would like to avoid any additional weight (a UPS). Greatly appreciated if you could recommend any other lightweight tube amp under 25lb and more than 10W Class A amps.
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It is a issue a person needs to address but I would not rule out the use of tube electronics if you can properly protect the gear when ac power goes unstable.
Why not simply plug the amp into a surge protection device. You will need to reset the unit after a blackout, but at least it will take your amp out of the circuit when the power comes back on.
How about a electromagnetic cutoff on the ac that is supplying power to your stereo system; loss of power the electromagnetic drops out and the contacts open and they can not close until manually reset by a person.