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<DIV><FONT size=2><FONT face=Arial color=#0000ff>Below is a quote to give
you something to think about if you are doing a clean install. This quote is
taken from an excellent article that can be found at: </FONT><A
href="http://www.hamtv.com/pdffiles/ATVinAcft.pdf"><FONT face=Arial
color=#0000ff>http://www.hamtv.com/pdffiles/ATVinAcft.pdf</FONT></A><BR><BR><FONT
face=Arial color=#0000ff>"... I realized that the braid of the RG58 coax to the
antenna would vibrate enough to change contact resistance between the strands
and that would show up as an AM modulation from SWR change. The solution is to
use Teflon double shielded coax with tight braid or aluminum foil. I suggest
RG400, which you can possibly get from companies that do mobile cellular phone
installations, or RG162."</FONT></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><FONT size=2><FONT face=Arial color=#0000ff>I use to run APRS while flying
a Tubine Commander and later a King Air 200 but now I am flying a Citation (and
going 100 MPH faster) I don't have the down time anymore in the
cockpit.</FONT></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2>Dave</FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2>WB0WNX</FONT></DIV>
<DIV><FONT size=2><FONT face=Arial color=#0000ff></FONT></FONT> </DIV>
<DIV><FONT size=2><FONT face=Arial color=#0000ff></FONT> </DIV>
<DIV><BR>-----Original Message-----<BR>From: aprssig-bounces@lists.tapr.org [<A
href="mailto:aprssig-bounces@lists.tapr.org">mailto:aprssig-bounces@lists.tapr.org</A>]
On Behalf Of Glenn Wiebe<BR>Sent: Saturday, September 16, 2006 11:21 AM<BR>To:
aprssig@lists.tapr.org<BR>Subject: [aprssig] APRS antenna for an
airplane<BR><BR>Would mounting a 1/4w vertical or similar antenna on the belly
of an aircraft not create a null area directly underneath the plane? I remember
the pilot of a Jet Ranger under contract to the company I worked for at the time
telling me that they would not install it there for use with our company 179 mhz
radio for that reason.<BR><BR>73 de
Glenn...VE4GN<BR><BR>_______________________________________________<BR>aprssig
mailing list<BR>aprssig@lists.tapr.org<BR><A
href="https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig">https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig</A><BR></DIV></FONT></BODY></HTML>