Jan,
Note the plug-in coil assmebly on the side of the Rx. It could tune
from 235 to 8000 KHz with the appropriate coils.
See attached.
73,
Al
Colleagues,
I've just found a reference on the Smithsonian Institution's
website that the ARC Model D of 1929 was the first commercial
navigation receiver. See here:
https://airandspace.si.edu/multimedia-gallery/14185hjpg
Does anyone know the specs of this set? Did it cover the 200 to
400 kHz range only?
73,
Jan SP5XZG
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