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Yes, they do (except for the filament voltage; can be either / or) however, the DC voltage levels needed to power large transmitting tubes are hard (if not impossible) to achieve with DC to DC conversion.
For example, a GU-39b-1 needs 6.3 volts at better than 100 amps to light the tube, 10,000 volts on the anode and, the control and screen grids need -70 volts and a +400 volts respectively; these are voltage levels that are best achieved using 120 volt AC input.
AC mobiles use inverters to provide 120 volts to light the tube and minor supplies and a 3 phase alternator driven power supply to generate the B+ for the anode (plate) of the tubes.
Is it possible to be on a lake and have a homing directional beam being emitted from the shore so a person could navigate to that beam's source? For example at night to a jetty.
The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources.
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