"Lew Hartswick" wrote in message
...
John G. wrote:

There were certainly 28VDC to 115? volt 3phaseAC inverters but also many
aircraft radios had individual dynamotors which were 28VDC in and various
high voltage DC out.

John G.
Anyone rememberwhat was called the " ARC 5" series of aircraft
equipment? :-) Transmitters and receivers.
...lew...

Sure. They were still common when I got my first ham license in 1959. I
never owned one, but I worked numerous stations that had them (with my WRL
Globe Chief and Hallicrafters S-107).

--
Ed Huntress