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<P>Desconhecia este modo de comunicação aplicado às radiocomunicações, que
consiste básica e literalmente "falar" por intermédio de uma espécie
monossílabos tónicos, tipo "DIT DAHHH DIT," etc., ao microfone. </P>
<P>Esta forma de comunicar adaptada, radica em técnicas milenares de comunicação
a longas distancias utilizando, por exemplo, os assobios codificados entre duas
montanhas e ainda utilizados em muitas zonas rurais de Portugal.</P>
<P>João Costa, CT1FBF</P></FONT>
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<P><STRONG><FONT face=Tahoma size=6>Voice powered 14 MHz transatlantic test on
Tuesday</FONT></STRONG></P>
<P><FONT face=Tahoma>On Tuesday November 10 at 1500 UTC Radio Amateurs will
attempt to span the Atlantic using a Voice Powered transmitter on 14.055 MHz
CW.</FONT></P><B>
<P><FONT face=Tahoma>Mike AA1TJ</FONT></B><FONT face=Tahoma> and other Radio
Amateurs have been experimenting with <B>''</B> transmitters, the power comes
from rectifying the audio signal from the microphone.</FONT></P>
<P><FONT face=Tahoma>Some remarkable distances have already been achieved using
voice powered transmitters, which generate an output of between 2.5 and 15 mW.
Now they are going to attempt to get this incredibly low power signal across the
Atlantic</FONT></P>
<P><FONT face=Tahoma>Mike writes</FONT></P>
<P><FONT face=Tahoma>"Some of the lads are heading over to the Maine seacoast on
Monday morning for what we're calling a "Rexpedition. " W1REX was kind enough to
secure the use of his family's beachfront camp for us for a couple of days. He
explained the urgency to them, saying, "...a bunch of radio-heads want to talk
to Europe with the equivalent of a cellphone with a dead battery."</FONT></P>
<P><FONT face=Tahoma>Rex, Seab, AA1MY and Jim, W1PID, are going to arrive early
on Monday to begin putting up the antennas. I plan to show up in time for lunch;
hopefully after all the hard work is done. </FONT></P>
<P><FONT face=Tahoma>Seab wants to erect a pair of half-wave phased verticals on
20m. I think the plan is to lift a 160m antenna using one of Seab's big
kites.</FONT></P>
<P><FONT face=Tahoma>Our hope is to cross the pond on both 160m QRP and with my
voice-powered 20m transmitter. The weather forecast looks great at least through
Tuesday. </FONT></P>
<P><FONT face=Tahoma>My "Code Talker" will be rockbound on 14.055MHz; same as
last Thursday. We'll begin the voice-powered 20m CW attempt the first thing on
Tuesday morning [1500 UTC Nov 10]. Again, the goal is to span the Atlantic, but
as always, I'll be very pleased to work anyone that hears me.</FONT></P>
<P><FONT face=Tahoma>By the way, last Thursday's voice-powered operation on 20m
was a great success. Altogether, I worked four stations and received one SWL
report. The best DX was W4FOA in Chickamauga, GA; a distance of 923miles. Tony
reported that my 15mW signal was "an honest 579". <BR>W4OP - located one hundred
miles to the north of Tony - handed me the same report and followed up with an
amazing recording (you can hear it on my website). </FONT></P>
<P><FONT face=Tahoma>Later in the day I received an email from AD5VC. Dana
reported that he clearly copied my callsign while listening on the LSU club
station (K5LSU) in Baton Rouge; a distance of 1375 miles (nearly half the
distance between the Maine coast and London, England).</FONT></P>
<P><FONT face=Tahoma>I thought these were remarkable results for 15mW into an
endfed wire at 35 feet. It makes next week's attempt from a saltwater QTH,
coupled with the low-angle of radiation with a spot of directional gain all the
more exciting.</FONT></P>
<P><FONT face=Tahoma>So please keep us in mind come next Tuesday morning. I'm
guessing Seab will be operating 160m QRP on both Monday and Tuesday
evenings.</FONT></P>
<P><FONT face=Tahoma>Thank you,</FONT></P><B><I>
<P><FONT face=Tahoma>Mike, AA1TJ</FONT></P></B></I>
<P><FONT face=Tahoma>See details of the first 161 km voice-powered QSO using
voice generated CW<BR></FONT></SPAN><A
href="http://www.southgatearc.org/news/october2009/161_km_voice_powered_qso.htm"><U><FONT
color=#0000ff><FONT color=#0000ff><SPAN lang=PT><FONT
face=Tahoma>http://www.southgatearc.org/news/october2009/<BR>161_km_voice_powered_qso.htm</FONT></U></FONT></FONT></SPAN></A></P><SPAN
lang=PT>
<P><FONT face=Tahoma>GQRP Club<BR></FONT></SPAN><A
href="http://www.gqrp.com/"><U><FONT color=#0000ff><FONT color=#0000ff><SPAN
lang=PT><FONT
face=Tahoma>http://www.gqrp.com/</FONT></U></FONT></FONT></SPAN></A></P><SPAN
lang=PT>
<P><FONT face=Tahoma>GQRP Yahoo Reflector<BR></FONT></SPAN><A
href="http://groups.yahoo.com/group/gqrp/"><U><FONT color=#0000ff><FONT
color=#0000ff><SPAN lang=PT><FONT
face=Tahoma>http://groups.yahoo.com/group/gqrp/</FONT></U></FONT></FONT></SPAN></A></P><SPAN
lang=PT>
<P><FONT face=Tahoma>Mike Rainey AA1TJ<BR></FONT></SPAN><A
href="http://mjrainey.googlepages.com/"><U><FONT color=#0000ff><FONT
color=#0000ff><SPAN lang=PT><FONT
face=Tahoma>http://mjrainey.googlepages.com/</FONT></U></FONT></FONT></SPAN></A></P></BODY></HTML>