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Doesn't everyone?
The PBM is already watching some of the Paris Olympics events that started before the opening ceremonies.
Vacuum tube radios used more than one power supply voltage. Battery powered ones used a low voltage supply for the tube heaters and a 45-135V supply for the B supply (vacuum tube plate). My courtesy uncle's radio also used a 15V (??? going by old memories here) for the negative bias. He lived on a houseboat and did not have electricity.
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