Text 29511, 59 rader
Skriven 2012-06-05 05:51:09 av Roy Witt (1:387/22)
  Kommentar till text 29495 av Ward Dossche (2:292/854)
Ärende: Fidonews Vol 29 No 23 June 04, 2012 Page: 2
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04 Jun 12 23:41, Ward Dossche wrote to Janis Kracht:

 JK>> men aboard the Itasca could hear Earhart loud and clear (S5). But
 JK>> Earhart and Noonan heard only one transmission from the Itasca on
 JK>> 7500 kHz. Earhart was unable to obtain a null on that frequency. The

 WD> Oh dear God .... Earheart transmitted at 3105lHz, a frequency set
 WD> aside to aviation by the FCC then. The Itasca could listen, but had
 WD> no means of transmitting at that frequency. Finally they attempted
 WD> Morse and that worked but the direction finder of the Electra
 WD> couldn't handle it.

Not according to the Coast Guard dispatch to the Itasca and copied to the
Governor of Samoa...

From George Palmer Putnam Collection of Amelia Earhart Papers.
web site: http://www.lib.purdue.edu/aearhart
Subjects: Earhart, Amelia, 1897-1937
          Lae (Papua New Guinea)
          Itasca (Ship)
          Radios

U.S. Coast Guard Dispatch, 2710, ITASCA TO GOVERNOR SAMOA, radio
calibrated, June 23, 1937

8028 FOLLOWING FOR AMELIA EARHART PUTNAM LAE QUOTE ITASCA TRANSMITTER
CALIBRATED 7500 6210 3105 500 AND 425 KCS CW AND LAST THREE EITHER CW OR
MCW PERIOD ITASCA DIRECTION FINDER FREQUENCY RANGE 550 TO 270 KCS PERIOD
REQUEST WE BE ADVISED AS TO TIME OF DEPARTURE AND ZONE TIME TO BE USED ON
RADIO SCHEDULES PERIOD ITASCA AT HOWLAND ISLAND DURING FLIGHT 0910

-------------

A PERIOD in the text indicates a period ending a sentence.

CW means Continous Wave and MCW means Modulated Continous Wave. Both
methods means that the ship was transmitting in Morse Code. CW/MCW is the
best method available for use in cases of communications that MUST get
through the noise level on those frequencies. As was previously indicated
by Itasca, Earharts 59 signal was probably in or just above the
atmospheric noise level. They could hear her fine, but that noise level
would have been tough in a noisy environment like an airplane of that era.

"LAST THREE EITHER CW" would indicate that the Itasca was also using AM
voice (amplitude modulated) radio on 7500 and 6510 Kilocycles.

0910 means daylight hour local (Howland) time.


                R\%/itt



... besides, IMNSHO, Ward Dossche should resign as ZC2 and surrender his
... net node-number to the ZCC !            - Cato the Elder -


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