April 1935 Short Wave Craft
Wax nostalgic about and learn from the history of early electronics. See articles
from Short Wave Craft,
published 1930 - 1936. All copyrights hereby acknowledged.
Plenty of intrigue still surrounds
the July 2, 1937, disappearance of Amelia Earhart in the South Pacific on her way to completing an
around-the-world flight. This article appeared two years prior to that fateful flight
proclaiming the soundness (no pun intended) of her onboard radio. Back in the day,
shortwave radio installations in aircraft required long wires trailing behind, particularly
for long distance requirements like flying from the U.S. mainland to Hawaii. Those
wires were a constant source of trouble due to destructive mechanical oscillations
while waving in the airstream, airframe damage due to striking during the haul in/out
procedure, and breakage. According to an article that appeared in the January 2015
Smithsonian magazine, it is suspected that Earhart's antenna broke
early in her flight and that is what was responsible for the loss of communication.
Navy ships were tasked to monitor her progress and reported picking up spotty transmissions,
but she never responded to messages sent to her. Interestingly, as the article explains,
our political tensions with Japan at the time made it risky to make known the presence
of fleet operations in the south Pacific. Earhart was a close friend of Eleanor
Roosevelt, which undoubtedly had no small part in securing the Navy's assistance
in the face of resistance from commanders.
was the guy that flew with her as navigator.
If you or your girlfriend / wife would like to dress in authentic replica Amelia
Earhart garb - and you have a lot of disposable funds - take a look at
"The Phoenix Project is dedicated to recreating clothing worn by the world's most
stylish icons." Très cool.
Amelia Earhart's Short-Wave Radio Never Failed
Miss Earhart and Paul Mantz, technical director of her transpacific
The famous red Lockheed plane. "W" indicates weight at the end
of the trailing wire antenna which is lowered as required.
Special and extremely efficient radio sending and receiving apparatus was installed
in Miss Amelia Earhart's plane before it left Burbank, where, at the Union Air Terminal,
exhaustive tests were made before the Lockheed was shipped to the Hawaiian Islands
on the Matson Liner, Lurline. In addition to a receiving set for beam flying, the
plane carried a special transport airplane transmitter manufactured by Western Electric.
Night frequency was 3105 kc., day, 6210 (96.66 and 48.28 meters). Power generated
from an automobile-type generator to the engine in the nose of the plane, feeds
a nest of storage batteries. These batteries lie near the radio apparatus located
just aft of the fuselage door in the stern of the ship. The batteries deliver current
to a Dynamotor which carries the current to the high tension crystal-controlled
transmitter set. Call numbers of the plane are KHABQ. Tests made early in January
by Paul Mantz, flying the Earhart plane 12,000 feet over Honolulu, carried his voice
over the intervening 2,228 nautical miles of the Pacific to stations in California
and Arizona and a broadcast message sent out by KFI acknowledged the reception immediately
afterwards. Mantz received the return message through the headset as clearly as
though he were in Los Angeles. The message from the plane was spoken into a new
type of close contact microphone, which eliminates cockpit noises.
The radio transmitting and receiving apparatus installed in Miss
Posted March 17, 2020(original