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<H1><FONT size=3>Caros Colegas,</FONT></H1>
<DIV><FONT face=Arial>No actual estado da propagação, em que que a <STRONG>NVIS
- Near Vertical Incidence SkyWave</STRONG>* raramente atinge os 7 MHz durante o
dia, esta é uma banda fundamental para as redes de emergência a nível nacional
em Onda Curta.</FONT></DIV>
<H1><FONT size=3>Mais informação sobre <FONT face=Arial>NVIS - Near Vertical
Incidence SkyWave* em português, por exemplo: <A
href="http://www.feirinhadigital.com.br/rbr/HAM/projetos-usuarios/NVIS/nvis.htm">http://www.feirinhadigital.com.br/rbr/HAM/projetos-usuarios/NVIS/nvis.htm</A></FONT></FONT></H1>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><IMG style="WIDTH: 242px; HEIGHT: 141px" height=305
alt="Antena V invertido com refletor"
src="http://www.feirinhadigital.com.br/rbr/HAM/projetos-usuarios/NVIS/DIPOLO-V-INVERTIDO.gif"
width=487 border=0><IMG style="WIDTH: 278px; HEIGHT: 152px" height=353
alt="Antena Dipolo dobrada com refletor"
src="http://www.feirinhadigital.com.br/rbr/HAM/projetos-usuarios/NVIS/DIPOLO-DOBRADA.gif"
width=491 border=0></DIV>
<H1>First 5 MHz licences issued to EI stations </H1>
<P><FONT face=Verdana>Good news at last. After a long process of contacts
between the military authorities and Ireland's regulator
<STRONG>ComReg</STRONG>, the first of the 5 MHz licences were issued to EI
stations on Friday, October 17th. </FONT></P>
<P><FONT face=Verdana>The<STRONG> Irish Radio Transmitters Society</STRONG>
said: <BR>"We hope by now that all of those who applied have received the
necessary permission. The permission varies the terms and conditions of the
licences concerned so as to include three 3 kHz channels with centre frequencies
of 5280, 5400 and 5405 kHz. </FONT></P>
<P><FONT face=Verdana>"The practice is to use Upper Sideband for voice
transmissions on these channels. As these are centre <BR>channel frequencies and
the actual dial readout on upper sideband is 5278.5, 5398.5 and 5403,5 kHz
respectively i.e. 1.5 kHz on the low frequency side of the centre of the
channel. The maximum power allowed is 200 watts. <BR>CW stations are encouraged
to use the bottom 300 Hz of the channels as this permits the use of the channel
for SSB at the same time. </FONT></P>
<P><FONT face=Verdana>"It should be noted that military cadet stations in the UK
which use special non amateur call signs are allowed to participate in the 5 MHz
experiment in the UK. EI stations with 5 MHz permissions can not communicate
with these stations and may only communicate with other licensed experimenter or
amateur stations."</FONT></P>
<P><FONT face=Verdana><STRONG>Dave EI3IO</STRONG> was one of the first EI’s on
the band and has sent IRTS some observations. He indicates that 5 MHz with its
near optimum Near Vertical Incidence Skywave (NVIS) properties provides superb
and stable communication during daylight hours around the Western European Isles
of EI, G, GI, GW and GM. At night, stations in North America on the East Coast
and the Mid West were easily workable. </FONT></P>
<P><FONT face=Verdana>After 48 hours with the 5 MHz permission Dave worked 12
DXCC countries including Bermuda, Greenland and Puerto Rico. In all he had 82
QSO’s in that period with the best DX being K5RK in Alvin Texas at 7189
kilometres. Other EI’s heard on the band were EI7CD, EI6IZ and EI7CC.
</FONT></P>
<P><FONT face=Verdana>Finally, IRTS offers a word of thanks to ComReg and to the
primary spectrum user for facilitating the release of the three channels at 5
MHz for experimentation </FONT></P>
<P><FONT face=Verdana>Fonte: </FONT><A href="http://www.irts.ie/"
target=_blank><FONT face=Verdana>IRTS</FONT></A></P></BODY></HTML>