Question on leaving TVs plugged in.....

[Radiophile2001]

Question for the AK braintrust:

I now have four color sets (three big ones) from 1967-1969. I am leaving them plugged in at all times. I know this is costing me on the electric bill. They are all plugged into surge protector strips which can easily be switched off.

Is it harmful to cut power to these old sets? Should I be leaving them plugged in to live current at all times?

Thanks for your help!

Carl