Doug Miller wrote:
In article , terry wrote:

The more consistently higher voltages these days can have an impact on
older radios that were operated back when on, say 115 volts or less.
But which today often face 120 or higher.
Again (for simplicity) doing the V squared business, the difference
between say 113 volts and say 120 volts is almost a 13% increase

No, it's not. It's an increase of 6.19%.

I think a visit to the electrical engineering and/or calculus books
might be in order. Remember that the issue is power rather than
just voltage.